Selectively altering microbiota for immune modulation

ABSTRACT

The invention relates to methods of modulating immune cells in a patient by altering microbiota of the patient. The invention also relates to methods of modulating treatments or therapies in a subject organism by altering microbiota of the subject. The invention also relates to cell populations, systems, arrays, cells, RNA, kits and other means for effecting this. In an example, advantageously selective targeting of a particular species in a human gut microbiota using guided nucleic acid modification is carried out to effect the alteration.

CROSS REFERENCE TO RELATED APPLICATION

This application is a Continuation Application of U.S. patent application Ser. No. 16/192,752, which was filed on Nov. 15, 2018, which is a Continuation Application of U.S. patent application Ser. No. 15/820,296, which was filed on Nov. 21, 2017 (now U.S. Pat. No. 10,195,273), which is a Continuation application under 35 U.S.C. § 120 of International Patent Application No. PCT/EP2017/063593, which was filed on Jun. 4, 2017, which claims priority benefit to United Kingdom Patent Application No. GB1609811.3, which was filed on Jun. 5, 2016, the contents of each of which are incorporated herein by reference in their entirety.

SUBMISSION OF SEQUENCE LISTING ON ASCII TEXT FILE

The content of the following submission on ASCII text file is incorporated herein by reference in its entirety: a computer readable form (CRF) of the Sequence Listing (file name: 786212000208SEQLIST.TXT, date recorded: Jun. 20, 2019, size: 8 KB).

FIELD OF THE INVENTION

The invention relates to methods of modulating immune cells in a patient (endogenous cells of the patient and/or administered cells, such as via adoptive cell therapy) by altering microbiota of the patient. The invention also relates to methods of modulating treatments or therapies in a subject organism by altering microbiota of the subject. The invention also relates cell populations, systems, kits and other means for effecting this. In an example, advantageously selective targeting of a particular species in a human gut microbiota using guided nucleic acid modification is carried out to effect the alteration.

BACKGROUND OF THE INVENTION

One approach to immunotherapy involves engineering patients' own (or a donor's) immune cells to express cell-surface antigen receptors (CARs) that recognise and attack tumours. Although this approach, called adoptive cell transfer (ACT), has been restricted to small clinical trials so far, treatments using these engineered immune cells have generated some remarkable responses in patients with advanced cancer.

The Chimeric Antigen Receptor (CAR) consists of an antibody-derived targeting domain fused with T-cell signaling domains that, when expressed by a T-cell, endows the T-cell with antigen specificity determined by the targeting domain of the CAR. CARs can potentially redirect the effector functions of a T-cell towards any protein and non-protein target expressed on the cell surface as long as an antibody-based targeting domain is available. This strategy thereby avoids the requirement of antigen processing and presentation by the target cell and is applicable to non-classical T-cell targets like carbohydrates. This circumvention of HLA-restriction means that the CAR T-cell approach can be used as a generic tool broadening the potential of applicability of adoptive T-cell therapy. See, eg, Methods Mol Biol. 2012; 907:645-66. doi: 10.1007/978-1-61779-974-7_36, “Chimeric antigen receptors for T-cell based therapy”, Cheadle E J et al.

The first CAR-T construct was described in a 1989 paper by immunotherapy pioneer Zelig Eshhar in PNAS. The structure of the CAR now comprises a transmembrane polypeptide chain which is a chimaera of different domains from different cellular proteins. For example, the CAR has an extracellular part joined (often by a linker and/or a hinge region) to an intracellular part, with a transmembrane portion of the CAR embedding the receptor in the membrane of an immune cell, normally a T-cell. The extracellular moiety includes an antibody binding site (usually in the form of an scFv, such as derived from a mouse mAb) that recognizes a target antigen, that commonly is a tumour associated antigen (TAA) on the surface of cancer cells. Antigen recognition in this way dispenses with the need to rely on TCRs that require MHC-restricted antigen presentation, and where binding affinities may be relatively low. The intracellular moiety of the CAR typically includes a CD3-zeta (CD3) domain for intracellular signaling when antigen is bound to the extracellular binding site. Later generation CARs also include a further domain that enhances T-cell mediated responses, which often is a 4-1BB (CD137) or CD28 intracellular domain. On encountering the cognate antigen ligand for the CAR binding site, the CAR can activate intracellular signaling and thus activation of the CAR T-cell to enhance tumour cell killing.

Most CAR-Ts expand in vivo so dose titration in a conventional sense is difficult, and in many cases the engineered T-cells appear to be active “forever”—i.e., the observation of on-going B-cell aplasia seen in most of the CD19 CAR-T clinical studies to date. This poses a serious problem for CAR T-cell approaches. Some observed risks are discussed in Discov Med. 2014 November; 18(100):265-71, “Challenges to chimeric antigen receptor (CAR)-T cell therapy for cancer”, Magee M S & Snook A E, which explains that the first serious adverse event following CAR-T cell treatment occurred in a patient with colorectal cancer metastatic to the lung and liver (Morgan et al., 2010). This patient was treated with T cells expressing a third-generation CAR targeting epidermal growth factor receptor 2 (ERBB2, HER2). The CAR contained an scFv derived from the 4D5 antibody (trastuzumab) that is FDA approved for the treatment of HER2-positive breast cancers (Zhao et al., 2009). The patient developed respiratory distress within 15 minutes of receiving a single dose of 1010 CAR-T cells, followed by multiple cardiac arrests over the course of 5 days, eventually leading to death. Serum analysis four hours after treatment revealed marked increases in the cytokines IFNγ, GM-CSF, TNFα, IL-6, and IL-10. CAR-T cells were found in the lung and abdominal and mediastinal lymph nodes, but not in tumour metastases. The investigators attributed toxicity to recognition of HER2 in lung epithelium resulting in inflammatory cytokine release producing pulmonary toxicity and cytokine release syndrome (CRS) causing multi-organ failure (Morgan et al., 2010). Trials utilizing second-generation HER2-targeted CARs derived from a different antibody (FRP5) following conservative dose-escalation strategies are currently underway for a variety of HER2+ malignancies by other investigators (clinicaltrials.gov identifiers NCT01109095, NCT00889954, and NCT00902044).

A variation on the CAR T-cell theme are antibody-coupled T-cell receptor (ACTR) therapeutics, which use CD16A (FCγRIIIA) to bind to Fc regions of tumour-specific IgG (see eg, WO2015/058018, US2015139943). The aim is to enable more control of CAR T-cell activity in vivo by titrating IgG administered to patients. The CD16 binding sites of the CAR-T-cells may be free, however, to also bind to endogenous IgG of the patients and this reduces the attractiveness of the approach. The approach also needs to consider the inherently long half-life of IgG in the body (around 20 days for IgG in man), which may limit control of CAR-cell activity. Ongoing studies may assess the risk of this.

It would be desirable to provide an alternative way to modulate (downregulate or upregulate) immune cell-based therapies, like CAR-T-cell approaches and other cell-based approaches. It would also be desirable to provide a way to address diseases and conditions mediated by endogenous immune cells, such as autoimmune, inflammatory and infectious diseases and conditions.

STATEMENTS OF INVENTION

The invention provides guided nucleases, host cell modifying (HM)-CRISPR/Cas systems, gRNAs, HM-arrays, HM-crRNA, HM-Cas, HM-TALENs, HM-meganucleases, HM-zinc fingers and methods as set out in the claims herein.

Medical practice often involves the administration of antibiotics to patients. Such treatments can typically involve administration of broad-spectrum antibiotics, or antibiotics that target many gram-positive bacterial species or many gram-negative species without discrimination. Similarly, use of broad-spectrum antibiotics in farming and agriculture, for example, raise environmental concerns, including entry of such antibiotics into the human and animal food chain which may be deleterious to health and may add to development of microbial resistance. Rather, the invention involves selective targeting of a first microbiota species or strain. As shown in the worked examples herein, selective targeting of a particular bacterial species has been achieved using guided nuclease targeting of the genome of the selected species, whilst at the same time sparing phylogenetically related species and strains. Furthermore, the invention realises the role that microbiota bacteria and archaea play in shaping immune function in humans and animals, as discussed further below.

Thus, the invention relates to methods of modulating immune cells in a patient (endogenous cells of the patient and/or administered cells, such as via adoptive cell therapy) by altering microbiota of the patient. In an example, advantageously selective targeting of a species in a microbiota (eg, gut microbiota) is carried out to effect the alteration. Selective targeting may, for example, avoid targeting of related species or strains, such as species of the same phylum or such as a different strain of the same species.

For example, the invention provides for modulating immune cell-based or other therapy of diseases and conditions in patients and subjects by altering microbiota, as well as systems, kits and other means for effecting this.

For example, the invention provides for treating or reducing diseases and conditions in patients by altering microbiota, wherein the diseases and conditions are those mediated by immune cells (eg, T-cells) or addressed by altering immune cell activities or populations in patients. Embodiments are cancers, autoimmune diseases or conditions, inflammatory diseases or conditions, viral infections (eg, HIV infection of human patients), or diseases or conditions mediated or caused by viral infections.

The invention also relates to methods of modulating treatments or therapies in a subject organism (eg, a plant, yeast, human or animal patient) by altering microbiota of the subject. Examples of therapies are adoptive cell therapy, antibody therapy (eg, immune checkpoint inhibition), radiation therapy, chemotherapy, eg, for treatment or prevention of a disease or condition in a patient.

In a first configuration the invention provides

A method of modulating a therapy of a disease or condition in a patient, the method comprising a. Carrying out the therapy in the patient; and b. Causing gut bacterial microbiota dysbiosis in the patient, whereby said dysbiosis modulates the therapy in the patient by modulating immune cells in the patient.

In another aspect, the first configuration the invention provides

A method of modulating a therapy of a disease or condition in a human or animal patient, the method comprising a. Carrying out the therapy in the patient; and b. Causing bacterial (eg, gut bacterial) microbiota dysbiosis in the patient, whereby said dysbiosis modulates the therapy in the patient by modulating immune cells in the patient; wherein the therapy comprises adoptive immune cell therapy (eg, adoptive T-cell therapy, eg, CAR-T cell administration to the patient).

In another aspect, the first configuration the invention provides

A method of modulating a therapy of a disease or condition in a human or animal patient, the method comprising a. Carrying out the therapy in the patient; and b. Causing bacterial (eg, gut bacterial) microbiota dysbiosis in the patient, whereby said dysbiosis modulates the therapy in the patient; wherein the therapy comprises administering an immune checkpoint inhibitor (eg, an anti-PD-L1, anti-PD-1, anti-CTLA4 or anti-TIM3 inhibitor, eg, an antibody) to the patient.

In another aspect, the first configuration the invention provides

A method of modulating a therapy of a disease or condition in a human or animal patient, the method comprising a. Carrying out the therapy in the patient; and b. Causing bacterial (eg, gut bacterial) microbiota dysbiosis in the patient, whereby said dysbiosis modulates the therapy in the patient; wherein the therapy comprises administering an antibody (eg, an anti-PD-L1, anti-PD-1, anti-CTLA4 or anti-TIM3 antibody; or an anti-TNFa superfamily member antibody, eg, an anti-TNFa, TNFR1 or BAFF antibody; or, an anti-IL6R or anti-IL-4Ra antibody; or an anti-PCSK9 antibody) to the patient.

In another aspect, the first configuration the invention provides

A method of modulating a treatment in a subject, the method comprising a. Carrying out the treatment in the subject; and b. Causing microbiota dysbiosis in the subject, whereby said dysbiosis modulates the treatment in the subject.

In an example, the subject or patient is a human. In an example, the subject or patient is a non-human animal. In an example, the subject is a plant, and optionally the treatment is a plant growth-promoting treatment, growth-inhibiting treatment, pesticide treatment, nitrogen fixing promotion treatment, herbicidal treatment or fertilizer treatment. In an example, the subject is a yeast, and optionally the treatment is a yeast growth-promoting treatment or growth-inhibiting treatment.

In an example, the modulating augments, upregulates, downregulates, inhibits, enhances or potentiates the treatment or therapy of the subject or patient. In an example, the treatment or therapy is effective in the subject or patient, wherein the treatment or therapy is not effective or has reduced or increased efficacy in the subject, patient or a control subject or patient that has not been subject to the modulation. The control is of the same species as the subject or patient, and optionally the same age and/or sex. In an example, bacterial or archaeal host cells are killed or growth thereof is inhibited in the subject or patient using a method of an invention, wherein the control comprises cells of the same bacterial or archaeal species and the cells are not killed or growth inhibited by a method of the invention.

In an example, steps (a) and (b) are carried out simultaneously. In an example, step (a) is carried out before step (b). In an example, step (b) is carried out before step (a), and optionally step (b) is performed again after (a).

In an embodiment, the invention provides

A method of modulating a treatment in a plant or yeast, the method comprising a. Carrying out the treatment in the plant or yeast; and b. Causing bacterial microbiota dysbiosis in the plant or yeast, whereby said dysbiosis modulates the treatment in the subject; wherein the treatment is a growth-promoting treatment, growth-inhibiting treatment, pesticide treatment, nitrogen fixing promotion treatment, herbicidal treatment or fertilizer treatment.

Causing microbial dysbiosis in the subject, patient, plant or yeast is, in an example comprises causing microbial dysbiosis on a surface of the subject, patient, plant or yeast, eg, on a leaf surface (when the the subject is a plant) or on skin, lung, ocular or mucosal surface (when the subject or patient is a human or animal).

Instead of or additionally to causing bacterial dysbiosis, the invention comprises in step (b) causing archaeal microbiota dysbiosis in said subject, patient, plant or yeast.

For example, the disease or condition is an autoimmune disease or condition (eg, SLE) and the therapy is a treatment therefor, eg, administration of a tumor necrosis factor ligand superfamily member antagonist, eg, an anti-B-cell activating factor (BAFF) antibody, such as BENLYSTA® (belimumab) or a generic version thereof. For example, the disease or condition is an inflammatory disease or condition (eg, rheumatoid arthritis, IBD, Crohn's disease, colitis or psoriasis) and the therapy is a treatment therefor, eg, administration of sarilumab, dupilumab, a tumor necrosis factor ligand superfamily member antagonist, eg, an anti-TNF alpha antibody or trap, such as HUMIRA® (adalimumab), REMICADE® (infliximab), SIMPONI® (golimumab) or ENBREL® (etanercept) or a generic version thereof. For example, the disease or condition is a viral infection or mediated by a viral infection (eg, HIV infection) and the therapy is a treatment therefor, eg, administration of an anti-retroviral medicament or an anti-HIV vaccine. For example, the disease or condition is a cancer (eg, melanoma, NSCLC, breast cancer or pancreatic cancer) and the therapy is a treatment therefor, eg, administration of a chemotherapeutic agent, eg, a checkpoint inhibitor or agonist antibody such as an anti-CTLA4, PD-1, PD-L1, PD-L2, LAG3, OX40, CD28, BTLA, CD137, CD27, HVEM, KIR, TIM-3, VISTA, ICOS, GITR, TIGIT or SIRPa antibody. In an example, the antibody is a bispecific antibody that specifically binds first and second targets selected from CTLA4, PD-1, PD-L1, PD-L2, LAG3, OX40, CD28, BTLA, CD137, CD27, HVEM, KIR, TIM-3, VISTA, ICOS, GITR, TIGIT and SIRPa, eg, wherein the first target is CTLA4 and the second target is LAG3 or PD-1. Optionally, the antibody is a human gamma-1 antibody and/or may be enhanced for ADCC or CDC. For example, the therapy is a vaccine therapy, eg, a cancer vaccine therapy or a vaccine therapy for treating or preventing an infection or infectious disease, such as malaria, HIV infection, tuberculosis infection, cholera, Salmonella typhimurium infection, C dificile infection, Bordetella pertussis infection or chlamydia infection.

An embodiment of the first configuration provides

A method of modulating a cell therapy of a disease or condition in a patient, the method comprising

-   -   a. Carrying out cell therapy in the patient, comprising         administering a population of cells to the patient, wherein         administration of said cells is capable of treating the disease         or condition in the patient; and     -   b. Causing gut bacterial microbiota dysbiosis in the patient,         whereby said dysbiosis modulates the cell therapy in the         patient.

In an example the cell therapy is an adoptive immune cell therapy, such as CAR-T or TILs therapy for the treatment of a cancer.

In a second configuration the invention provides

A method of treating or reducing the risk of a disease or condition in a patient, wherein the disease or condition is mediated by immune cells (eg, T-cells) in the patient, the method comprising causing gut bacterial microbiota dysbiosis in the patient, whereby said dysbiosis modulates immune cells (eg, T_(H)17 cells) in the patient, thereby treating or reducing the risk of said disease or condition in the patient.

For example, the disease or condition is an autoimmune disease or condition (eg, SLE), an inflammatory disease or condition (eg, rheumatoid arthritis, IBD, Crohn's disease, colitis or psoriasis), a viral infection or mediated by a viral infection (eg, HIV infection).

In an example, microbiota dysbiosis is effected by killing one or more target bacterial species in the microbiota or inhibiting growth of a population of said bacteria in the microbiota. In an example, microbiota dysbiosis is effected by killing one or more target archaeal species in the microbiota or inhibiting growth of a population of said archaea in the microbiota.

In a third configuration the invention provides

A method of modulating an adoptive immune cell therapy of a disease or condition in a patient, the method comprising

-   -   a. Carrying out adoptive immune cell therapy in the patient,         comprising administering a population of immune cells to the         patient, wherein administration of said immune cells is capable         of treating the disease or condition in the patient; and     -   b. Altering the relative proportion of a sub-population of cells         of a first bacterial species or strain, or archaeal species or         strain, in a microbiota (eg, gut microbiota) of the patient,         thereby producing an altered microbiota that modulates the         immune cell therapy in the patient.

In another aspect, the third configuration the invention provides

A method of modulating a therapy of a disease or condition in a human or animal patient, the method comprising a. Carrying out the therapy in the patient; and b. Altering the relative proportion of a sub-population of cells of a first bacterial species or strain, or archaeal species or strain, in a microbiota (eg, gut microbiota) of the patient, thereby producing an altered microbiota that modulates the therapy in the patient; wherein the therapy comprises administering an immune checkpoint inhibitor (eg, an anti-PD-L1, anti-PD-1, anti-CTLA4 or anti-TIM3 inhibitor, eg, an antibody) to the patient.

In another aspect, the third configuration the invention provides

A method of modulating a therapy of a disease or condition in a human or animal patient, the method comprising a. Carrying out the therapy in the patient; and b. Altering the relative proportion of a sub-population of cells of a first bacterial species or strain, or archaeal species or strain, in a microbiota (eg, gut microbiota) of the patient, thereby producing an altered microbiota that modulates the therapy in the patient; wherein the therapy comprises administering an antibody (eg, an anti-PD-L1, anti-PD-1, anti-CTLA4 or anti-TIM3 antibody; or an anti-TNFa superfamily member antibody, eg, an anti-TNFα, TNFR1 or BAFF antibody; or, an anti-IL6R or anti-IL-4Ra antibody; or an anti-PCSK9 antibody) to the patient.

In another aspect, the third configuration the invention provides

A method of modulating a treatment in a subject, the method comprising a. Carrying out the treatment in the subject; and b. Altering the relative proportion of a sub-population of cells of a first bacterial species or strain, or archaeal species or strain, in a microbiota of the subject, whereby said dysbiosis modulates the treatment in the subject.

In an example, the subject or patient is a human. In an example, the subject or patient is a non-human animal. In an example, the subject is a plant, and optionally the treatment is a plant growth-promoting treatment, growth-inhibiting treatment, pesticide treatment, nitrogen fixing promotion treatment, herbicidal treatment or fertilizer treatment. In an example, the subject is a yeast, and optionally the treatment is a yeast growth-promoting treatment or growth-inhibiting treatment.

In an example, the modulating augments, upregulates, downregulates, inhibits, enhances or potentiates the treatment or therapy of the subject or patient. In an example, the treatment or therapy is effective in the subject or patient, wherein the treatment or therapy is not effective or has reduced or increased efficacy in the subject, patient or a control subject or patient that has not been subject to the modulation. The control is of the same species as the subject or patient, and optionally the same age and/or sex. In an example, bacterial or archaeal host cells are killed or growth thereof is inhibited in the subject or patient using a method of an invention, wherein the control comprises cells of the same bacterial or archaeal species and the cells are not killed or growth inhibited by a method of the invention.

In an example, steps (a) and (b) are carried out simultaneously. In an example, step (a) is carried out before step (b). In an example, step (b) is carried out before step (a), and optionally step (b) is performed again after (a).

In an embodiment, the invention provides

A method of modulating a treatment in a plant or yeast, the method comprising a. Carrying out the treatment in the plant or yeast; and b. Altering the relative proportion of a sub-population of cells of a first bacterial species or strain, or archaeal species or strain, in a microbiota of the plant or yeast, whereby said dysbiosis modulates the treatment in the plant or yeast; wherein the treatment is a growth-promoting treatment, growth-inhibiting treatment, pesticide treatment, nitrogen fixing promotion treatment, herbicidal treatment or fertilizer treatment.

Said altering of the relative proportion of sub-population of cells in the subject, patient, plant or yeast is, in an example comprises causing microbial dysbiosis on a surface of the subject, patient, plant or yeast, eg, on a leaf surface (when the the subject is a plant) or on skin, lung, ocular or mucosal surface (when the subject or patient is a human or animal).

The proportion of the first bacteria or archaea sub-population is increased or decreased. In an example, the relative ratio of first and second bacterial species or strains is altered (eg, increased or decreased); or the relative ratio of first and second archaeal species or strains is altered (eg, increased or decreased).

In an example, the adoptive immune cell therapy is CAR-T therapy for the treatment of a cancer. In an example, the adoptive immune cell therapy is a TILs therapy for the treatment of a cancer.

In an example of the first or third configuration, the cells of step (a) are of a first type selected from the group consisting of CD4⁺ T-cells, CD8⁺ T-cells, T_(H)1 cells or T_(H)17 cells and step (b) upregulates cells of that type in the patient. This is useful for enhancing the cell based therapy. In another example the cells of step (a) are of a first type selected from the group consisting of CD4⁺ T-cells, CD8⁺ T-cells, T_(H)1 cells or T_(H)17 cells and step (b) downregulates cells of that type in the patient. This is useful for dampening down the cell based therapy or a side effect thereof (eg, CRS).

In an embodiment, the disbyosis or step (b) is carried out using selective targeting of a bacterial or archaeal microbiota sub-population using CRISPR/Cas targeting of microbiota (eg, gut microbiota) bacteria and/or archaea. In an example, the method comprises using guided nuclease (eg RNA-guided nuclease) cutting of a respective target sequence in host cells to modify the target sequences, whereby host cells are killed or the host cell population growth is reduced, thereby reducing the proportion of said sub-population in the microbiota. Suitable systems for carrying out the guided nuclease cutting are, for example, engineered CRISPR/Cas systems, TALENs, meganucleases and zinc finger systems.

To this end, the inventors believe that they have demonstrated for the first time inhibition of population growth of a specific bacterial strain in a mixed consortium of bacteria that naturally occur together in gut microbiota with one or more of the following features:—

-   -   Population growth inhibition using an engineered CRISPR/Cas         system by     -   targeting wild-type cells;     -   harnessing of wild-type endogenous Cas nuclease activity;     -   targeting essential and antibiotic resistance genes;     -   wherein the targets are wild-type sequences.

The inventors have demonstrated this in a mixed population of human gut microbiota bacteria with the following features:—

-   -   targeting bacterial growth inhibition in a mixed population of         human gut microbiota species;     -   wherein the population comprises three different species;     -   comprising selective killing of one of those species and sparing         cells of the other species;     -   targeting cell growth inhibition in the presence of a         phylogenetically-close other human gut microbiota species, which         is spared such inhibition;     -   targeting cell growth inhibition in a mixed population of human         gut microbiota bacteria comprising target Firmicutes species and         non-Firmicutes species;     -   targeting cell growth inhibition of a specific Firmicutes         species whilst sparing a different Firmicutes species in a mixed         population of human gut microbiota bacteria;     -   targeting cell growth inhibition of a specific gram positive         bacterial strain whilst sparing a different gram positive         bacterial species in a mixed population of human gut microbiota         bacteria;     -   targeting a human gut microbiota bacterial species whilst         sparing a commensul human gut bacterial species;     -   targeting a human gut microbiota bacterial species whilst         sparing a priobiotic human gut bacterial species;     -   targeting cell growth inhibition in a mixed population of human         gut microbiota bacteria on a surface;     -   achieving at least a 10-fold growth inhibition of a specific         bacterial species alone or when mixed with a plurality of other         bacterial species in a consortium of human gut microbiota         bacteria; and     -   achieving at least a 10-fold growth inhibition of two different         strains of a specific human gut microbiota bacterial species.

The invention provides:

An ex vivo population of immune cells for use in a method of adoptive cell therapy of a patient for treating or preventing a disease or condition in the patient, the method comprising

-   -   a. Carrying out adoptive immune cell therapy in the patient,         comprising administering cells of said population to the         patient, wherein administration of said immune cells is capable         of treating the disease or condition in the patient; and     -   b. Causing gut bacterial microbiota dysbiosis in the patient,         whereby said dysbiosis modulates the immune cell therapy in the         patient and said disease or condition is treated or prevented.

The invention provides

An ex vivo population of immune cells for use in a method of adoptive cell therapy of a patient for treating or preventing a disease or condition in the patient, the method comprising

-   -   a. Carrying out adoptive immune cell therapy in the patient,         comprising administering cells of said population to the         patient, wherein administration of said immune cells is capable         of treating the disease or condition in the patient; and     -   b. Altering the relative proportion of a sub-population of cells         of a first bacterial species or strain, or archaeal species or         strain, in the gut microbiota of the patient, thereby producing         an altered gut microbiota that modulates the immune cell therapy         in the patient. The invention also provides CRISPR/Cas systems,         arrays, cRNAs and kits for carrying out a method of the         invention.

The invention also relates to systems, kits and other means for effecting the method.

Any features on one configuration herein are, in an example, combined with a different configuration of the invention for possible inclusion of such combination in one or more claims herein.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows s Xylose inducible system.

FIG. 2 shows a ST1-CRISPR array.

FIG. 3 shows a spot assay on TH-agar of the strains used in this work. All strains were grown on TH-agar at 37° C. for 20 hours. Serial dilutions of overnight cultures were done in duplicate for E. coli, L lactis and S. mutans, and triplicate for both strains of S. thermophilus in order to count individual colonies.

FIG. 4 shows selective growth of S. thermophilus, S. mutans, L. lactis and E. coli under different culture conditions. Tetracycline cannot be used to selectively grown S. thermophilus LMD-9. However, 3 g l⁻¹ of PEA proved to selectively grow S. thermophilus LMD-9 while limiting growth of E. coli.

FIG. 5 illustrates construction of two xylose induction cassettes.

FIG. 6 demonstrated characterization of the xylose inducible cassette in Streptococcus thermophilus LMD-9 with the plasmid pBAV1KT5-XylR-mCherry-Pldha. A clear response in fluorescence can be observed with increasing amount of xylose.

FIG. 7 illustrates the design of CRISPR array in pBAV1KT5-XylR-mCherry-P_(ldha+XylA). The array contains 2 spacer sequences that target S. thermophilus genes under an inducible xylose promoter and a tracrRNA under a strong constitutive promoter P_(3A).

FIG. 8 shows transformation efficiency of Streptococcus thermophilus LMD-9 with the plasmid pBAV1KT5-XylR-CRISPR-P_(ldh+XylA) and with pBAV1KT5-XylR-CRISPR-P_(XylA).

FIG. 9 shows a schematic of the xylose-inducible CRISPR device. Upon induction of xylose the CRISPR array targeting both polIII and tetA on the S. thermophiles LMD-9 genome are expressed. Together with the constitutively expressed tracrRNA a complex is formed with Cas9. This complex will introduce a double stranded break in the tetA and polIII genes in the S. thermophilus LMD-9 genome resulting in limited cell viability.

FIG. 10 shows growth inhibition of Streptococcus thermophilus DSM 20617(T) with the plasmid pBAV1KT5-XylR-CRISPR-PXylA or pBAV1KT5-XylR-CRISPR-Pldha+XylA, not induced and induced. Picture taken after 63H of incubation. Colony counts in bottom left corner (top row: >1000, >1000, bottom row: 336, 113).

FIG. 11 shows a maximum-likelihood phylogenetic tree of 16S sequences from S. thermophilus, L. lactis and E. coli.

FIG. 12 shows the selective S thermophilus growth inhibition in a co-culture of E. coli, L. lactis and S. thermophiles harboring either the pBAV1KT5-XylR-CRISPR-PxylA or the pBAV1KT5-XylR-CRISPR-PldhA+XylA plasmid. No growth difference is observed between E. coli harboring the pBAV1KT5-XylR-CRISPR-PxylA or the pBAV1KT5-XylR-CRISPR-PldhA+XylA plasmid. However, S. thermophiles (selectively grown on TH agar supplemented with 2.5 gl−1 PEA) shows a decrease in transformation efficiency between the pBAV1KT5-XylR-CRISPR-PxylA (strong) or the pBAV1KT5-XylR-CRISPR-PldhA+XylA (weak) plasmid as we expected. We thus demonstrated a selective growth inhibition of the target S. thermophilus sub-population in the mixed population of cells. Colony counts in bottom left corner (top row: >1000, >1000, 68, bottom row: >1000, >1000, 32).

FIG. 13 shows regulators controlling the expression of spCas9 and the self-targeting sgRNA targeting the ribosomal RNA subunit 16s.

FIG. 14 shows specific targeting of E. coli strain by an exogenous CRISPR-Cas system. The sgRNA target the genome of K-12 derived E. coli strains, like E. coli TOP10, while the other strain tested was unaffected.

FIG. 15 shows spot assay with serial dilutions of individual bacterial species used in this study and mixed culture in TH agar without induction of CRISPR-Cas9 system.

FIG. 16 shows spot assay of the dilution 10³ on different selective media. TH with 2.5 g l⁻¹ PEA is a selective media for B. subtilis alone. MacConkey supplemented with maltose is a selective and differential culture medium for bacteria designed to selectively isolate Gram-negative and enteric bacilli and differentiate them based on maltose fermentation. Therefore TOP10 ΔmalK mutant makes white colonies on the plates while Nissle makes pink colonies; A is E coli ΔmalK, B is E coli Nissile, C is B subtilis, D is L lactis, E is mixed culture; the images at MacConkey−/B and E appear pink; the images at MacConkey+/B and E appear pink.

FIG. 17 shows selective growth of the bacteria used in this study on different media and selective plates.

DETAILED DESCRIPTION

In the worked Example below, growth inhibition was addressed in a mixed population of human gut microbiota bacterial species. A >10-fold population growth inhibition in a selectively targeted species (a gram positive Firmicutes population) was achieved, sparing non-targeted commensal bacteria in the consortium. The inventors have realised the useful application of this for altering microbiota, such as gut microbiota, in situ in patients, thereby enabling immune cell modulation in the patient in response to the altered microbiota. The inventors also realised application to modulating treatments in subjects such as plants and yeast that comprise microbiota that can be altered. The inventors furthermore realised the utility for modulating immune cell-based therapies in patients or for treating or preventing immune cell-mediated diseases or conditions in patients, such as autoimmune diseases, inflammatory diseases and viral infections (eg, HIV infection of humans). The inventors realised the utility of causing dysbiosis of gut, skin, vaginal, nasal, ocular, lung, GI tract, rectal, scrotal, ear, skin or hair microbiota for effecting such modulation in a human or animal subject or patient.

As used herein “dysbiosis” refers to a change of the bacterial and/or archaeal balance of the microbiota, eg, gut microbiota. Change is relative to the balance prior to (eg, immediately prior or no more than a day before) carrying out the method. The change can be one or more of (i) an increase in the proportion of a first species (bacterial or archaeal species) or strain in the microbiota (eg, gut microbiota) (eg, B fragalis or thetaiotamicron); (ii) an increase in the relative proportion of first and second species (eg, B fragalis versus C dificile; or S thermophilus v E coli or L lactis), first and second strains of the same species, or first and second phyla which are different from each other (eg, Bacteriodetes versus Firmicutes); (iii) an addition of a species or strain that was not comprised by the microbiota prior to the treatment method; (iv) a decrease in the proportion of a first species (bacterial or archaeal species) or strain in the microbiota (eg, C dificile or S thermophilus); (v) a decrease in the relative proportion of first and second species (eg, B fragalis versus C dificile; or S thermophilus v E coli or L lactis), first and second strains of the same species, or first and second phyla which are different from each other (eg, Bacteriodetes versus Firmicutes); and (vi) a removal of a species or strain that was not comprised by the microbiota prior to the treatment method. Dysbiosis may be effected, for example, using one or more selective antibacterial agents (eg, CRISPR-based or other guided nucleases described herein) of by administering one or more bacterial and/or archaeal transplants to the patient or subject to alter the balance of the microbiota, eg, gut microbiota.

The impact of the immune system on microbiota composition is suggested by several immune deficiencies that alter microbial communities in ways that predispose to disease. For example, Garrett et al. studied mice that lack the transcription factor T-bet (encoded by Tbx21), which governs inflammatory responses in cells of both the innate and the adaptive immune system (Cell. 2007 Oct. 5; 131(1):33-45, “Communicable ulcerative colitis induced by T-bet deficiency in the innate immune system”, Garrett W S et al.). When Tbx21−/− mice were crossed onto Rag2−/− mice, which lack adaptive immunity, the Tbx21−/−/Rag2−/− progeny developed ulcerative colitis in a microbiota-dependent manner. Remarkably, this colitis phenotype was transmissible to wild-type mice by adoptive transfer of the Tbx21−/−/Rag2−/−microbiota. This demonstrated that altered microbiota were sufficient to induce disease. Another example of immune-driven dysbiosis is seen in mice deficient for epithelial cell expression of the inflammasome component NLRP6. These mice develop an altered microbiota with increased abundance of members of the Bacteroidetes phylum associated with increased intestinal inflammatory cell recruitment and susceptibility to chemically-induced colitis.

It has become evident that individual commensal species influence the makeup of lamina propria T lymphocyte subsets that have distinct effector functions. Homeostasis in the gut mucosa is maintained by a system of checks and balances between potentially pro-inflammatory cells, which include T_(H)1 cells that produce interferon-γ, T_(H)17 cells that produce IL-17a, IL-17f, and IL-22, diverse innate lymphoid cells with cytokine effector features resembling T_(H)2 and T_(H)17 cells, and anti-inflammatory Foxp3⁺ regulatory T cells (T_(regs)).

A particular application of the invention is found in the shaping of T_(H)17 cell populations in patients. Such cells have been implicated in autoimmune and inflammatory disorders. These cells were described in: Harrington L E, Hatton R D, Mangan P R, et al., “Interleukin 17-producing CD41 effector T cells develop via a lineage distinct from the T helper type 1 and 2 lineages”, Nat Immunol. 2005; 6(11): 1123-1132; and Park H, Li Z, Yang X O, et al., “A distinct lineage of CD4 T cells regulates tissue inflammation by producing interleukin 17”, Nat Immunol. 2005; 6(11):1133-1141. In the case of autoimmune disorders, T_(H)17 cell over activation can cause an inappropriate amount of inflammation, like in the case of multiple sclerosis, rheumatoid arthritis, and psoriasis. T_(H)17 cells have also been shown to be necessary for maintenance of mucosal immunity. T_(H)17 cells may contribute to the development of late phase asthmatic response due to increases in gene expression relative to T_(reg) cells.

In HIV, the loss of T_(H)17 cell populations can contribute to chronic infection. The depletion of T_(H)17 cell populations in the intestine disrupts the intestinal barrier, increases levels of movement of bacteria out of the gut through microbial translocation, and contributes to chronic HIV infection and progression to AIDS. Microbial translocation results in bacteria moving from out of the gut lumen, into the lamina propia, to the lymph nodes, and beyond into non-lymphatic tissues. It can cause the constant immune activation seen through the body in the late stages of HIV. Increasing T_(H)17 cell populations in the intestine has been shown to be both an effective treatment as well as possibly preventative. Although all CD4⁺ T cells gut are severely depleted by HIV, the loss of intestinal T_(H)17 cells in particular has been linked to symptoms of chronic, pathogenic HIV and SIV infection. Microbial translocation is a major factor that contributes to chronic inflammation and immune activation in the context of HIV. In non-pathogenic cases of SIV, microbial translocation is not observed. T_(H)17 cells prevent severe HIV infection by maintaining the intestinal epithelial barrier during HIV infection in the gut. Because of their high levels of CCR5 expression, the coreceptor for HIV, they are preferentially infected and depleted. Thus, it is through T_(H)17 cell depletion that microbial translocation occurs. Additionally, the loss of T_(H)17 cells in the intestine leads to a loss of balance between inflammatory T_(H)17 cells and T_(reg) cells, their anti-inflammatory counterparts. Because of their immunosuppressive properties, they are thought to decrease the anti-viral response to HIV, contributing to pathogenesis. There is more T_(reg) activity compared to T_(H)17 activity, and the immune response to the virus is less aggressive and effective. Revitalizing T_(H)17 cells has been shown to decrease symptoms of chronic infection, including decreased inflammation, and results in improved responses to highly active anti-retroviral treatment (HAART). This is an important finding—microbial translocation generally results in unresponsiveness to HAART. Patients continue to exhibit symptoms and do not show as reduced a viral load as expected. In an SIV-rhesus monkey model, It was found that administering IL-21, a cytokine shown to encourage T_(H)17 differentiation and proliferation, decreases microbial translocation by increasing T_(H)17 cell populations.

In an example of the method, IL-21, IL-15 and/or IL-2 is administered to the patient sequentially or simultaneously with the cell population. This is useful for further modulating immune cell populations in the patient.

Yang et al. observed that the presence of T_(H)17 cells in mice requires colonisation of mice with microbiota. Segmented filamentous bacteria (SFB) were sufficient to induce T_(H)17 cells and promote T_(H)17-dependent autoimmune disease in animal models (Nature, 2014 Jun. 5; 510(7503):152-6. doi: 10.1038/nature13279. Epub 2014 Apr. 13, “Focused specificity of intestinal Th17 cells towards commensal bacterial antigens”, Yang Y et al.). SFB appear able to penetrate the mucus layer overlying the intestinal epithelial cells in the terminal ileum, and they interact closely with the epithelial cells, inducing host cell actin polymerization at the site of interaction and, presumably, signaling events that result in a T_(H)17 polarizing environment within the lamina propria.

In an example, the first bacteria are of a species or strain comprising a 16s rDNA sequence that is at least 80, 85, 90, 95, 96, 97, 98 or 99% identical to a 16s rDNA sequence of a segmented filamentous bacterium. In an embodiment, the method increases the proportion of the first bacteria, wherein T_(H)17 cells in the patient are upregulated, eg, wherein the disease is a cancer or a viral infection (eg, HIV). In an embodiment, the method decreases the proportion of the first bacteria, wherein T_(H)17 cells in the patient are downregulated, eg, wherein the disease or condition is an autoimmune or inflammatory disease or condition, or for reducing the risk of CRS in a cancer patient receiving ACT.

In an example, the method treats or prevents an allergic disease or condition, eg, asthma. In an example, the method treats or prevents an IgE-mediated disease or condition, eg, asthma.

In an example, the method reduces autotoxicity in the patient mediated by T_(H)2 cell cytokine release.

López et al. observed that intestinal dysbiosis, characterised by a reduced Firmicutes/Bacteroidetes ratio, has been reported in systemic lupus erythematosus (SLE) patients. In their study, in vitro cultures revealed that microbiota isolated from SLE patient stool samples (SLE-M) promoted lymphocyte activation and T_(H)17 differentiation from naïve CD4⁺ lymphocytes to a greater extent than healthy control microbiota. Enrichment of SLE-M with T_(reg)-inducing bacteria showed that a mixture of two Clostridia strains significantly reduced the T_(H)17/T_(H)1 balance, whereas Bifidobacterium bifidum supplementation prevented CD4⁺ lymphocyte over-activation. Ex vivo analyses of patient samples showed enlarged T_(H)17 and Foxp3* IL-17⁺ populations, suggesting a possible T_(reg)-T_(H)17 trans-differentiation. Moreover, analyses of faecal microbiota revealed a negative correlation between IL-17⁺ populations and Firmicutes in healthy controls, whereas in SLE this phylum correlated directly with serum levels of IFNγ, a T_(H)1 cytokine slightly reduced in patients. (Sci Rep. 2016 Apr. 5; 6:24072. doi: 10.1038/srep24072, “Th17 responses and natural IgM antibodies are related to gut microbiota composition in systemic lupus erythematosus patients”, López P et al.).

Other bacteria have been shown to enhance the anti-inflammatory branches of the adaptive immune system by directing the differentiation of T_(regs) or by inducing IL-10 expression. For example, colonisation of gnotobiotic mice with a complex cocktail of 46 mouse Clostridial strains, originally isolated from mouse faeces and belonging mainly to cluster IV and XIVa of the Clostridium genus, results in the expansion of lamina propria and systemic T_(regs).

Bacteroides fragilis polysaccharide-A (PSA) impacts the development of systemic T cell responses. Colonization of germ-free mice with PSA-producing B. fragilis results in higher numbers of circulating CD4⁺ T cells as compared to mice colonized with B. fragilis lacking PSA. PSA-producing B. fragilis also elicits higher T_(H)1 cell frequencies in the circulation. Together, these findings show that commensal bacteria have a general impact on immunity that reaches well beyond mucosal tissues.

The decrease in F. prausnitzii found in IBD patients is of interest because this bacteria is butyrate-producing, and its oral administration reduces the severity of TNBS-induced colitis in mice. In an example, the first species is a butyrate-producing bacterial species (eg, F. prausnitzii) and the proportion of the first species in the microbiota is reduced, wherein the method downregulates T-effector and/or T-helper cells in the patient, thereby treating or preventing said disease or condition (eg, an autoimmune or inflammatory disease or condition or CRS).

Archaea have traditionally been divided into five phyla, namely Crenarchaeota, Euryarchaeota, Korarchaeota, Nanoarchaeota and Thaumarchaeota. Based on the increasing wealth of whole genome data (mainly from environmental isolates), the archaeal phylogeny has been revisited recently: the four groups Korarchaeota, Crenarchaeota, Thaumarchaeota and the newly proposed Aigarchaeota have been comprised into one superphylum (the so-called TACK-superphylum) to the exclusion of Euryarchaeota and Nanoarchaeota. The first species in the method of the invention can be any of the archaea mentioned in this paragraph.

T cells mature in the thymus, express TCR (T cell receptor), and can express either CD8 glycoprotein on their surface and are called CD⁸⁺ T cells (cytotoxic) or CD4 glycoprotein and are then called CD4 cells (helper T cells). CD⁴⁺ cells differentiate into different subsets: T_(H) (T helper)1, T_(H) 2, T_(H)9, T_(H)17, T_(H)22, T_(reg) (regulatory T cells) and T_(fh) (follicular helper T cells), which are characterized by different cytokine profiles. These different CD4⁺ subsets play a critical role in the immune and effector response functions of T cells. All CD4⁺ T_(H) subsets are differentiated from naive CD4⁺ T cells by specific cytokines: T_(H) 1 by IL-12 and IFN-γ (pro-inflammatory cytokine, with multiple roles such as increase of TLR (Toll-like receptor), induction of cytokine secretion or macrophage activation); T_(H)2 by IL-4; T_(reg) by IL-2 and TGF-beta. Each T_(H) subset releases specific cytokines that can have either pro- or anti-inflammatory functions, survival or protective functions. For example, T_(H)1 releases IFN-γ and TNF; T_(H)2 releases IL-4 (an important survival factor for B-type lymphocytes), IL-5 and IL-13; T_(H)9 produces IL-9; T_(reg) secretes IL-10 (a cytokine with an immunosuppressive function, maintaining expression of FOXP3 transcription factor needed for suppressive function of T_(reg) on other cells) and TGF-β; T_(H)17 produces IL-17 (a cytokine playing an important role in host defense against bacteria, and fungi).

An embodiment of the invention finds application for modulating CAR-T and other adoptive immune-cell therapies (such as adoptive TILs therapy). Several reports have demonstrated differential roles of different types of cytokines released by CD4+ subsets, an important consideration when assessing CAR-T and other immune cell-based therapies. T_(H) 1 and T_(H) 2 CD4⁺ T cell subset cytokines were shown to drive different types of cytotoxicity generated by second generation CD28-containing CAR-T. Short-term toxicity was observed with high levels of T_(H)1 cytokines, while high doses of T_(H) 2 type cytokines generated chronic autocytotoxicity in animals that received second generation CD19-specific CAR-T. CAR-T cells engineered to deliver inducible IL-12 modulated tumor stroma to destroy cancer. IL-12 release by engineered CAR-T cells increased anti-cancer activity by recruiting macrophages. IL-12 released by CAR-T also induced reprogramming of suppressive cells, reversing their inhibitory functions suggesting its evaluation in clinical trials. The persistence of CAR-T therapy was shown to be dependent on the number of CD4⁺ cells and the number of central memory cells in the infused product. CD8⁺ clones isolated from central memory T cells but not from CD8⁺ effector cells persisted long-term in vivo during adoptive T cell transfer in a nonhuman primate model, indicating the importance of specific T cell subset functions for effective adoptive immunotherapy. It has also been shown that the combination of CD8⁺ subset with CD4⁺ subset significantly enhanced T cell adoptive transfer. CD4⁺ cells were shown to support development of CD8⁺ memory functions, demonstrating the importance of both subsets and combinations in immunotherapy trials. Several preclinical models demonstrated the advantage of different T cell subsets for effective CAR-T therapy: CD8⁺ CD45RA⁺ CCR7⁺ CAR-T cells with closest to the T-memory stem cells phenotype cells produced greater anti-tumor activity of CAR-T cells; both CD8⁺ and CD4⁺ subsets expressed synergistic anti-tumor CAR-T activities.

In an example, the administered cell population is a population of CAR-T cells comprising a combination of a CD8⁺ CAR-T subset with CD4⁺ CAR-T subset.

In an example of the invention, the cell therapy is an adoptive T-cell therapy and optionally cells selected from the group consisting of CD4+ T-cells, CD8+ T-cells, TH1 cells and TH17 cells are administered to the patient. In an example, cell therapy is enhanced by the method of the invention, eg, immune cell cytotoxicity of cancer cells is enhanced in the patient, or treatment of the disease or condition is enhanced. In an example, cell therapy is reduced by the method of the invention, eg, immune cell cytotoxicity of cancer cells is reduced in the patient, or the risk of CRS is reduced (eg, in a cancer patient). Thus, in an embodiment the method reduces or prevents the risk of cytokine release syndrome (CRS) in the patient. In an embodiment the method reduces or prevents the risk of an unwanted side-effect of the cell therapy (eg, a CAR-T therapy side effect in a human patient, such as CRS).

In an example, the immune cell population comprises CAR-T cells and/or T-cells expressing engineered T-cell receptors (TCRs) and/or tumour infiltrating lymphocytes (TILs, eg, Engineered TILs). WO2013063361, U.S. Pat. No. 9,113,616, US20130109053, US20160081314 and WO2016044745 (whose disclosures are incorporated herein by reference) describe suitable transgenic in vivo platforms for generating CARs and TCRs for use in generating cells for use in the present invention. The immune cell population may comprise engineered autologous or allogeneic immune cells (transplant), eg, T-cells, NK cells and/or TILs, eg, wherein the cells and patient are human. A benefit of autologous cells is that the modulation of the endogenous system is likely to be tuned similarly to modulation of the cell transplanted autologous cells. In an embodiment, the administered cells and patient are of the same species or strain, for example, human or rodent (eg, mouse), for example, HLA or MHC matched donor transplant and recipient patient.

In an example, the the T-cells are CD4⁺ T-cells or T_(H)17 cells. For example, the administered CAR-T cells comprise a chimaeric antigen receptor comprising an ICOS intracellular domain and optionally the cells are T_(H)17 cells. In an embodiment, the administered T-cells are CD8⁺ CD45RA⁺ CCR7⁺ CAR-T cells.

Adoptive transfer experiments in mice indicate that T_(H)17 cells have higher in vivo survival and self-renewal capacity than T_(H)1 polarized cells. In an example, therefore, T_(H)17 cells are modulated in the patient, eg, upregulated, eg, expanded in the patient, or downregulated. These may be endogenous T-cells of the patient and/or cells that have been administered to the patient or progeny thereof. In an embodiment, RORγt-expressing T_(H)17 cells are upregulated, eg, expanded in the patient. In an embodiment expression of one or more T_(H)17-related genes is increased, eg, one or more of Rorc, Il22 and Il26. In an embodiment expression of one or more T_(H)1-related genes is increased, eg, one or more of Ifng, Tnfa and Tbx21 (T-bet). In an embodiment, in this case the disease or condition is a cancer.

In an example, T_(reg) cells are modulated in the patient, eg, upregulated, eg, expanded in the patient, or downregulated. These may be endogenous T-cells of the patient and/or cells that have been administered to the patient or progeny thereof. In an embodiment, in this case the disease or condition is an autoimmune, inflammatory or infectious disease or condition when the T_(reg) cells are upregulated.

In an example, CD4⁺ cells are modulated in the patient, eg, upregulated, eg, expanded in the patient, or downregulated. These may be endogenous cells of the patient and/or cells that have been administered to the patient or progeny thereof.

In an example, CD8⁺ cells are modulated in the patient, eg, upregulated, eg, expanded in the patient, or downregulated. These may be endogenous cells of the patient and/or cells that have been administered to the patient or progeny thereof.

In an example, tumour infiltrating lymphocytes (TILs) are modulated in the patient, eg, upregulated, eg, expanded in the patient, or downregulated. These may be endogenous cells of the patient and/or cells that have been administered to the patient or progeny thereof.

In an example, memory cells, such as one or more of central memory T cells (T_(CM)), effector memory T cells (T_(EM)), stem cell memory cells (T_(SCM)) and effector cells (T_(eff)), are upregulated in the microbiota or patient, optionally wherein the cells are comprised by the immune cell population administered to the patient and/or are progeny thereof. In an embodiment, the memory cells are CD45RO⁺CD62L⁺ or CD25⁺ CD45RA⁻ CD45RO⁺ CD127⁺.

Upregulation of a cell population may, for example, be an increase in the population size or proportion of cells of that type (eg, species or strain) in the microbiota or patient or subject and/or an increase in the activity (eg, cytotoxicity, effector function or suppressor function) of cells of that type in the microbiota or patient or subject. Downregulation of a cell population may, for example, be an decrease in the population size or proportion of cells of that type (eg, species or strain) in the microbiota or patient or subject and/or a decrease in the activity (eg, cytotoxicity, effector function or suppressor function) of cells of that type in the microbiota or patient or subject.

In an example, the cell therapy population comprises CAR-T cells (ie, respectively T-cells engineered to surface-express chimaeric antigen receptors (CARs). Alternatively, the cells are CAR-TIL or CAR-NK cells. A CAR comprises an extracellular receptor domain for binding to a target antigen (eg, a tumour cell antigen), a transmembrane moiety and an intracellular moiety comprising one or more (eg, first and second) signalling domains for signalling in the immune cell (eg, T-cell). Examples of suitable intracellular domains are well known, eg, a combination of a CD3ζ domain and one or more of an ICOS, CD28, OX40 or 4-1BB signalling domain, eg, a combination of an ICOS and CD28; or ICOS and 41-BB; CD28 and 41-BB signalling domain.

Optionally, the cell population is comprised by a transplant that is administered to the patient to treat or prevent a disease (eg, a cancer, autoimmune disease, transplant rejection or GvHD) or the cell or transplant is for such use.

In an example, the patient is a human, eg, is a woman; or a man.

In an example, the patient or human has undergone lymphodepletion before administration of the immune cell (eg, CAR-T cell).

Techniques for producing CARs and CAR T-cells are known and routine in the art, and these can be generally applied to producing cells for use in the invention (eg, see WO2012079000A1; U.S. Pat. Nos. 8,906,682, 8,911,993, 8,916,381, 8,975,071, 9,101,584, 9,102,760, 9,102,761, 9,328,156, 9,464,140, 9,481,728, 9,499,629, 9,518,123, 9,540,445, US20130287748, US20130288368, US20130309258, US20140106449, US20140370017, US20150050729, US20150093822, US20150099299, US20150118202, US20160130355, US20160159907, US20160194404, US20160208012; J Immunother. 2009 September; 32(7): 689-702, doi: 10.1097/CJI.0b013e3181ac6138, “Construction and Pre-clinical Evaluation of an Anti-CD19 Chimeric Antigen Receptor”, James N. Kochenderfer et al; also WO2014012001 and US20150290244 for general methods applicable to the present invention). For example, use of electroporation, retroviral vectors or lentiviral vectors—as will be known by the skilled addressee—can be used to introduce nucleotide sequences encoding elements of the CAR into T-cells, NK cells, TILs or other immune cells to produce the CAR-cells. Cells isolated from the patient (autologous cell sample) or from another donor of the same species (allogeneic sample) can be used to provide ancestor cells that are genetically engineered to include the CAR-encoding sequences. Expansion of cells can be used in the process, as known in the art. For example, after engineering CAR-cells, the cell population can be massively expanded using routine techniques to produce a transplant that is administered (eg, transfused) into the patient. The patient can be a human on non-human animal. Nucleotide sequences for one or more of the CAR elements (eg, for one or more of thee signalling domains) can be cloned or sequenced using a cell obtained from the patient or from another donor.

For example, the CAR comprises a first intracellular signalling domain, which is a human CD3ζ domain and the cells administered to the patient are human cells comprising an endogenous nucleotide sequence encoding said human CD3ζ domain. In an example, the CD3 zeta signaling domain comprises SEQ ID NO: 1, i.e., the amino acid sequence of SEQ ID NO: 24 as disclosed in WO2012079000A1, which sequence is explicitly incorporated herein for use in the present invention and possible inclusion in one or more claims herein. In an example, the CD3 zeta signaling domain is encoded by SEQ ID NO: 2, i.e., the nucleic acid sequence of SEQ ID NO: 18 as disclosed in WO2012079000A1, which sequence is explicitly incorporated herein for use in the present invention and possible inclusion in one or more claims herein.

For example, the first signalling domain is a human CD28 domain and the cell population of the invention is a population of human cells each comprising an endogenous nucleotide sequence encoding said human CD28 domain.

For example, the first signalling domain is a human 4-1BB domain and the cell population of the invention is a population of human cells each comprising an endogenous nucleotide sequence encoding said human 4-1BB domain.

For example, the first signalling domain is a human OX40 domain and the cell population of the invention is a population of human cells each comprising an endogenous nucleotide sequence encoding said human OX40 domain.

In an example, the first signalling domain is a CD3 domain, and the first and second intracellular signalling domains do not naturally occur together in a single cell (eg, a human wild-type cell or a cell isolated from the patient), eg, the second domain is a CD28, CD27, OX40 or 4-1BB domain.

In an example, the first intracellular domain is a CD3ζ domain, CD28 domain or 4-1BB domain.

In an example, the CAR is an engineered single polypeptide comprising (in N- to C-terminal direction) an antigen binding site (eg, an antibody scFv, which may be human); an optional hinge (eg, a human CD8a hinge); a transmembrane domain (eg, a human CD8α or CD28 transmembrane domain); and a human CD3ζ domain. In an example, the CAR is a complex of two or more of said polypeptides. Optionally, the CAR comprises a further intracellular signalling domain (i) between the transmembrane and CD3 domains. Optionally, the CAR comprises a further intracellular signalling domain, wherein the CD3ζ domain is between the further signaling domain and the transmembrane domain. In an example, the further signalling domain is a human CD27 domain, CD28 domain, ICOS domain, OX40 domain, CD40 domain, 4-1BB domain, a FcεRIγ domain, CD64 domain or CD16 domain. In an alternative, instead of a single polypeptide, the CAR comprises an engineered complex of at least 2 polypeptides comprising said domains.

The immune cells may be administered either alone, or as a pharmaceutical composition in combination with diluents and/or with other components such as IL-2 or other cytokines or cell populations.

In an embodiment, the immune cells (eg, CAR cells or cells bearing TCRs) comprise cell surface binding sites (eg, provided by the CAR or TCR) that bind a TAA. Tumour antigens (TAA) are proteins that are produced by tumour cells that elicit an immune response, particularly T-cell mediated immune responses. The selection of the antigen binding specificity will depend on the particular type of cancer to be treated. Tumour antigens are well known in the art and include in the context of an embodiment of the invention, for example, a glioma-associated antigen, carcinoembryonic antigen (CEA), β-human chorionic gonadotropin, alphafetoprotein (AFP), lectin-reactive AFP, thyroglobulm, RAGE-1, MN-CA IX, human telomerase reverse transcriptase, RU1, RU2 (AS), intestinal carboxyi esterase, mut hsp70-2, M-CSF, prostase, prostate-specific antigen (PSA), PAP, NY-ESO-1, LAGE-1a, p53, prostein, PSMA, Her2/neu, survivin and telomerase, prostate-carcinoma tumour antigen-1 (PCTA-1), MAGE, ELF2M, neutrophil elastase, ephrinB2, CD22, insulin growth factor (IGF)-I, IGF-II, IGF-I receptor and mesothelin.

In one embodiment, the tumour antigen comprises one or more antigenic cancer epitopes associated with a malignant tumour. Malignant tumours express a number of proteins that can serve as target antigens for an immune attack. These molecules include but are not limited to tissue-specific antigens such as MART-1, tyrosinase and GP 100 in melanoma and prostatic acid phosphatase (PAP) and prostate-specific antigen (PSA) in prostate cancer. Other target molecules belong to the group of transformation-related molecules such as the oncogene HER-2/Neu ErbB-2. Yet another group of target antigens are onco-foetal antigens such as carcinoembryonic antigen (CEA). In B-cell lymphoma the tumour-specific idiotype immunoglobulin constitutes a truly tumour-specific immunoglobulin antigen that is unique to the individual tumour. B-cell differentiation antigens such as CD I 9, CD20 and CD37 are other candidates for target antigens in B-cell lymphoma. Some of these antigens (CEA, HER-2, CD19, CD20, idiotype) have been used as targets for passive immunotherapy with monoclonal antibodies with limited success. The first antigen or fourth binding moiety can be any of these TAAs or can be an antigenic sequence of any of these TAAs.

Non-limiting examples of TAA antigens in an embodiment of the invention include the following: Differentiation antigens such as MART-1/MelanA (MART-1), g1OO (Pmel 17), tyrosinase, TRP-1, TRP-2 and tumour-specific multilineage antigens such as MAGE-1, MAGE-3, BAGE, GAGE-1, GAGE-2, pi 5; overexpressed embryonic antigens such as CEA; overexpressed oncogenes and mutated tumour-suppressor genes such as p53, Ras, HER-2/neu; unique tumour antigens resulting from chromosomal translocations; such as BCR-ABL, E2A-PRL, H4-RET, 1GH-IGK, MYL-RAR; and viral antigens, such as the Epstein Barr virus antigens EBVA and the human papillomavirus (HPV) antigens E6 and E7. Other large, protein-based antigens include TSP-180, MAGE-4, MAGE-5, MAGE-6, RAGE, NY-ESO, p1 85erbB2, p 1 80erbB-3, c-met, nm-23H1, PSA, TAG-72, CA 19-9, CA 72-4, CAM 17.1, NuMa, K-ras, beta-Catenin, CDK4, Mum-1, p 15, p 16, 43-9F, 5T4(791Tgp72} alpha-fetoprotem, beta-HCG, BCA225, BTAA, CA 125, CA 15-3\CA 27.29\BCAA, CA 195, CA 242, CA-50, CAM43, CD68\ I, CO-029, FGF-5, G250, Ga733VEpCAM, HTgp-175, M344, MA-50, MG7-Ag, MOV 18, NB/70K, NY-CO-1, RCAS 1, SDCCAG16, TA-90Mac-2 binding proteiiAcyclophilin C-associated protein, TAAL6, TAG72, TLP, and TPS.

In one embodiment, the CAR or TCR comprises a binding site for human CD 19, eg, for a CAR this can be provided by an anti-CD 19 scFV, optionally wherein the anti-CD19 scFV is encoded by SEQ ID NO: 3, i.e., SEQ ID: 14 disclosed in WO2012079000A1. In one embodiment, the anti-CD 19 scFV comprises SEQ ID NO: 4, i.e., the amino acid sequence of SEQ ID NO: 20 disclosed in WO2012079000A1. The sequences in this paragraph appear in WO2012079000A1 and are explicitly incorporated herein for use in the present invention and for possible inclusion in one or more claims herein.

In one embodiment, the transmembrane domain that naturally is associated with one of the domains in the CAR is used. In some instances, the transmembrane domain can be selected or modified by amino acid substitution to avoid binding of such domains to the transmembrane domains of the same or different surface membrane proteins to minimize interactions with other members of the receptor complex.

The transmembrane domain may be derived either from a natural or from a synthetic source. Where the source is natural, the domain may be derived from any membrane-bound or transmembrane protein. Transmembrane regions of particular use in this invention may be derived from (i.e. comprise at least the transmembrane region(s) of) the alpha, beta or zeta chain of the T-cell receptor, CD28, CD3 epsilon, CD45, CD4, CD5, CDS, CD9, CD16, CD22, CD33, CD37, CD64, CD80, CD86, CD 134, CD137 or CD 154. Alternatively the transmembrane domain may be synthetic, in which case it will comprise predominantly hydrophobic residues such as leucine and valine. Optionally, a triplet of phenylalanine, tryptophan and valine will be found at each end of a synthetic transmembrane domain.

Optionally, a short oligo- or polypeptide linker, preferably between 2 and 10 amino acids in length forms a linkage between the transmembrane domain and the intracellular part of the immune cell transmembrane protein, such as the CAR. A glycine-serine doublet provides a particularly suitable linker (eg, a (G₄S)_(n) linker as disclosed herein).

Optionally, the transmembrane domain is the CD8 transmembrane domain encoded by SEQ ID NO: 5, i.e., the nucleic acid sequence of SEQ ID NO: 16 disclosed in WO2012079000A1. In one embodiment, the CD8 transmembrane domain comprises SEQ ID NO: 6, i.e., the amino acid sequence of SEQ ID NO: 22 disclosed in WO2012079000A1. The sequences in this paragraph appear in WO2012079000A1 and are explicitly incorporated herein for use in the present invention and for possible inclusion in one or more claims herein.

In some instances, the transmembrane domain comprises the CD8 hinge domain encoded by SEQ ID NO: 7, i.e., the nucleic acid sequence of SEQ ID NO: 15 disclosed in WO2012079000A1. In one embodiment, the CD8 hinge domain comprises SEQ ID NO: 8, i.e., the amino acid sequence of SEQ ID NO: 21 disclosed in WO2012079000A1. The sequences in this paragraph appear in WO2012079000A1 and are explicitly incorporated herein for use in the present invention and for possible inclusion in one or more claims herein.

The intracellular part or otherwise the intracellular signaling domain(s) of the transmembrane protein expressed by cells of the cell population administered to the patient is responsible for activation of at least one of the normal effector functions of the immune cell that expresses the transmembrane protein (eg, a T-cell function, such as leading to cytotoxicity (for T-effector cells for example) or suppression (for T-regulatory cells)). The term “effector function” refers to a specialized function of a cell. Effector function of a T cell, for example, may be cytolytic activity or helper activity including the secretion of cytokines. Thus the term “intracellular signaling domain” refers to the portion of a protein which transduces the effector function signal and directs the cell to perform a specialized function. While usually the entire intracellular signaling domain can be employed, in many cases it is not necessary to use the entire chain. To the extent that a truncated portion of the intracellular signaling domain is used, such truncated portion may be used in place of the intact chain as long as it transduces the effector function signal. The term “signaling domain” is thus meant to include any truncated portion of the intracellular signaling domain sufficient to transduce the effector function signal. Examples of intracellular signaling domains for use in the transmembrane protein of the administered cells include the cytoplasmic sequences of the T cell receptor (TCR) and co-receptors that act in concert to initiate signal transduction following antigen receptor engagement, as well as any derivative or variant of these sequences and any synthetic sequence that has the same functional capability.

It is known that signals generated through the TCR alone are insufficient for full activation of the T cell and that a secondary or co-stimulatory signal is also required. Thus, T cell activation can be said to be mediated by two distinct classes of cytoplasmic signaling sequence: those that initiate antigen-dependent primary activation through the TCR (primary cytoplasmic signaling domain) and those that act in an antigen-independent manner to provide a secondary or co-stimulatory signal (secondary cytoplasmic signaling domain). Primary cytoplasmic signaling sequences regulate primary activation of the TCR complex either in a stimulatory way, or in an inhibitory way. Primary cytoplasmic signaling sequences that act in a stimulatory manner may contain signaling motifs which are known as immunoreceptor tyrosine-based activation motifs or ITAMs.

In an example, the first signalling domain is a primary cytoplasmic signaling domain (eg, CD3ζ domain). In an example, the first signalling domain is a secondary cytoplasmic signaling domain (eg, CD28 or 4-1BB domain).

In an example, the first signalling domain comprises one or more ITAMs.

Examples of suitable ITAM containing primary cytoplasmic signaling domains that are of particular use in the invention include those derived from TCR zeta, FcR gamma, FcR beta, CD3 gamma, CD3 delta, CD3 epsilon, CDS, CD22, CD79a, CD79b, and CD66d. It is particularly preferred that cytoplasmic signaling molecule in the transmembrane protein of the invention comprises a cytoplasmic signaling sequence derived from CD3 zeta.

The intracellular part optionally comprises (eg, as the first signalling domain or a further intracellular domain) a domain of a costimulatory molecule. A costimulatory molecule is a cell surface molecule other than an antigen receptor or their ligands that is required for an efficient response of lymphocytes (eg, T- or NK cells) to an antigen. Examples of such molecules include CD27, CD28, 4-1BB (CD 137), OX40, CD30, CD40, PD-1, ICOS, lymphocyte function-associated antigen-1 (LFA-1), CD2, CD7, LIGHT, NKG2C, B7-H3, and a ligand that specifically binds with CD83, and the like. Thus, these and other costimulatory elements are within the scope of the invention for use in the intracellular part of the transmembrane protein.

The intracellular moiety domains may be linked together by one or more linkers, eg, a (G₄S)_(n) linker as disclosed herein.

In one embodiment, the intracellular moiety comprises the signaling domain of CD3-zeta and the signaling domain of CD28. In another embodiment, the intracellular moiety comprises the signaling domain of CD3-zeta and the signaling domain of 4-1BB. In yet another embodiment, the intracellular moiety comprises the signaling domain of CD3-zeta and the signaling domain of CD28 and 4-1BB.

In one embodiment, the intracellular moiety comprises the signaling domain of 4-1BB and the signaling domain of CD3-zeta, wherein the signaling domain of 4-1BB is encoded by SEQ ID NO: 9, i.e., the nucleic acid sequence set forth in SEQ ID NO: 17 disclosed in WO2012079000A1 and the signaling domain of CD3-zeta is encoded by SEQ ID NO: 2, i.e., the nucleic acid sequence set forth in SEQ ID NO: 18 disclosed in WO2012079000A1. The sequences in this paragraph appear in WO2012079000A1 and are explicitly incorporated herein for use in the present invention and for possible inclusion in one or more claims herein.

In one embodiment, the intracellular moiety comprises the signaling domain of 4-1BB and the signaling domain of CD3-zeta, wherein the signaling domain of 4-1BB comprises SEQ ID NO: 10, i.e., the amino acid sequence of SEQ ID NO: 23 disclosed in WO2012079000A1 and the signaling domain of CD3-zeta comprises SEQ ID NO: 1, i.e., the amino acid sequence of SEQ ID NO: 24 disclosed in WO2012079000A1. The sequences in this paragraph appear in WO2012079000A1 and are explicitly incorporated herein for use in the present invention and for possible inclusion in one or more claims herein.

In one embodiment, the intracellular moiety comprises the signaling domain of 4-1BB and the signaling domain of CD3-zeta, wherein the signaling domain of 4-1BB comprises SEQ ID NO: 10, i.e., the amino acid sequence set forth in SEQ ID NO: 23 as disclosed in WO2012079000A1 and the signaling domain of CD3-zeta comprises SEQ ID NO: 1, i.e., the amino acid sequence set forth in SEQ ID NO: 24 disclosed in WO2012079000A1. The sequences in this paragraph appear in WO2012079000A1 and are explicitly incorporated herein for use in the present invention and for possible inclusion in one or more claims herein.

Sources of T-cells and other immune cells are disclosed in WO2012079000A1, U.S. Pat. Nos. 8,906,682, 8,911,993, 8,916,381, 8,975,071, 9,101,584, 9,102,760, 9,102,761, 9,328,156, 9,464,140, 9,481,728, 9,499,629, 9,518,123, 9,540,445, US20130287748, US20130288368, US20130309258, US20140106449, US20140370017, US20150050729, US20150093822, US20150099299, US20150118202, US20160130355, US20160159907, US20160194404, US20160208012, as well as methods of generating, activating and expanding these. These disclosures are referred to for possible use in working the present invention.

Cancers for Treatment or Prevention by the Method

Cancers that may be treated include tumours that are not vascularized, or not substantially vascularized, as well as vascularized tumours. The cancers may comprise non-solid tumours (such as haematological tumours, for example, leukaemias and lymphomas) or may comprise solid tumours. Types of cancers to be treated with the invention include, but are not limited to, carcinoma, blastoma, and sarcoma, and certain leukaemia or lymphoid malignancies, benign and malignant tumours, and malignancies e.g., sarcomas, carcinomas, and melanomas. Adult tumours/cancers and paediatric tumours/cancers are also included.

Haematologic cancers are cancers of the blood or bone marrow. Examples of haematological (or haematogenous) cancers include leukaemias, including acute leukaemias (such as acute lymphocytic leukaemia, acute myelocytic leukaemia, acute myelogenous leukaemia and myeloblasts, promyeiocytic, myelomonocytic, monocytic and erythroleukaemia), chronic leukaemias (such as chronic myelocytic (granulocytic) leukaemia, chronic myelogenous leukaemia, and chronic lymphocytic leukaemia), polycythemia vera, lymphoma, Hodgkin's disease, non-Hodgkin's lymphoma (indolent and high grade forms), multiple myeloma, Waldenstrom's macroglobulinemia, heavy chain disease, myeiodysplastic syndrome, hairy cell leukaemia and myelodysplasia.

Solid tumours are abnormal masses of tissue that usually do not contain cysts or liquid areas. Solid tumours can be benign or malignant. Different types of solid tumours are named for the type of cells that form them (such as sarcomas, carcinomas, and lymphomas). Examples of solid tumours, such as sarcomas and carcinomas, include fibrosarcoma, myxosarcoma, liposarcoma, chondrosarcoma, osteosarcoma, and other sarcomas, synovioma, mesothelioma, Ewing's tumour, leiomyosarcoma, rhabdomyosarcoma, colon carcinoma, lymphoid malignancy, pancreatic cancer, breast cancer, lung cancers, ovarian cancer, prostate cancer, hepatocellular carcinoma, squamous cell carcinoma, basal cell carcinoma, adenocarcinoma, sweat gland carcinoma, medullary thyroid carcinoma, papillary thyroid carcinoma, pheochromocytomas sebaceous gland carcinoma, papillary carcinoma, papillary adenocarcinomas, medullary carcinoma, bronchogenic carcinoma, renal cell carcinoma, hepatoma, bile duct carcinoma, choriocarcinoma, Wilms' tumour, cervical cancer, testicular tumour, seminoma, bladder carcinoma, melanoma, and CNS tumours (such as a glioma (such as brainstem glioma and mixed gliomas), glioblastoma (also known as glioblastoma multiforme) astrocytoma, CNS lymphoma, germinoma, medulloblastoma, Schwannoma craniopharyogioma, ependymoma, pineaioma, hemangioblastoma, acoustic neuroma, oligodendroglioma, menangioma, neuroblastoma, retinoblastoma and brain metastases).

In one embodiment, the administered cells express a first antigen binding site (eg, comprised by a CAR) that is designed to treat a particular cancer. For example, it specifically binds to CD19 can be used to treat cancers and disorders, eg, pre-B ALL (paediatric indication), adult ALL, mantle cell lymphoma, diffuse large B-cell lymphoma or for salvage post allogenic bone marrow transplantation. In another embodiment, the first moiety or first binding site specifically binds CD22 to treat diffuse large B-cell lymphoma.

In one embodiment, cancers and disorders include but are not limited to pre-B ALL (paediatric indication), adult ALL, mantle cell lymphoma, diffuse large B-cell lymphoma, salvage post allogenic bone marrow transplantation, and the like can be treated using a combination of bridging agents (or binding moieties or sites comprised by a single agent) that target two or three of: CD19, CD20, CD22, and ROR1 (eg, CD19 and one of the other targets).

In an example, the cells comprises first and second transmembrane proteins (eg, CARs or a CAR and an engineered TCR expressed by a T-cell) that are different, eg that differ in their target antigens (and optionally otherwise are the same). Similarly, the invention may use a mixture of immune cells (eg, a mixture of CAR-cells), eg comprised by the same transplant, wherein the mixture comprises cells comprising transmembrane proteins (eg, CARs or a CAR and an engineered TCR expressed by a T-cell) that are different, eg that differ in their target antigens (and optionally otherwise are the same). This may be useful for reducing resistance to treatment by cancers, for example, or more effectively targeting cell populations such as cancer cells that surface express a plurality of target antigens.

In one embodiment, the antigen binding site specifically binds to mesothelin to treat or prevent mesothelioma, pancreatic cancer or ovarian cancer.

In one embodiment, the antigen binding site specifically binds to CD33/IL3Ra to treat or prevent acute myelogenous leukaemia.

In one embodiment, the antigen binding site specifically binds to c-Met to treat or prevent triple negative breast cancer or non-small cell lung cancer.

In one embodiment, the antigen binding site specifically binds to PSMA to treat or prevent prostate cancer.

In one embodiment, the antigen binding site specifically binds to Glycolipid F77 to treat or prevent prostate cancer.

In one embodiment, the antigen binding site specifically binds to EGFRvII to treat or prevent gliobastoma.

In one embodiment, the antigen binding site specifically binds to GD-2 to treat or prevent neuroblastoma or melanoma.

In one embodiment, the antigen binding site specifically binds to NY-ESO-1 TCR to treat myeloma, sarcoma or melanoma.

In one embodiment, the antigen binding site specifically binds to MAGE A3 TCR to treat myeloma, sarcoma and melanoma.

Specific antigen binding is binding with a KD of 1 mM or lower (eg, 1 mM or lower, 100 nM or lower, 10 nM or lower, 1 nM or lower, 100 pM or lower, or 10 pM or lower) as determined by Surface Plasmon Resonance (SPR) in vitro at 25 degrees celcius or rtp.

In one example, said treatment using the method reduces progression of the disease or condition or a symptom thereof. In one example, said treatment using the method reduces incidence of the disease or condition or symptom thereof, eg, for at least 1, 2, 3, 4, or 5 years.

In an example, the method is in vivo in a mammal, eg, a human, man or woman, or male child or female child, or a human infant (eg, no more than 1, 2, 3 or 4 years of age). In an example, the patient is an adult human or a paediatric human patient.

The CAR or TCR is engineered, ie, comprises a non-naturally-occurring combination of moieties and domains. In an example, the cell therapy targets a target cell, wherein the target cell is a cancer cell, eg, a leukaemic cell, lymphoma cell, adenocarcinoma cell or cancer stem cell. Optionally, the CAR or TCR of administered immune cells specifically binds to human CD19 (and optionally the target cell is a leukaemic or lymphoma cell), EpCAM (and optionally the target cell is a lung cancer cell, gastrointestinal cancer cell, an adenocarcinoma, cancer stem cell), CD20 (and optionally the target cell is a leukaemic cell), MCSP (and optionally the target cell is a melanoma cell), CEA, EGFR, EGFRvIII, sialyl Tn, CD133, CD33 (and optionally the target cell is a leukaemic cell, eg, AML cell), PMSA, WT1, CD22, L1CAM, ROR-1, MUC-16, CD30, CD47, CD52, gpA33, TAG-72, mucin, CIX, GD2, GD3, GM2, CD123, VEGFR, integrin, cMET, Her1, Her2, Her3, MAGE1, MAGE A3 TCR, NY-ESO-1, IGF1R, EPHA3, CD66e, EphA2, TRAILR1, TRAILR2, RANKL, FAP, Angiopoietin, mesothelin, Glycolipid F77 or tenascin.

Optionally, the CAR comprises the variable domains of an antibody selected from the group consisting of the CD19 binding site of blinatumomab or antibody HD37; EpCAM binding site of Catumaxomab; CD19 binding site of AFM11; CD20 binding site of Lymphomun; Her2 binding site of Ertumaxomab; CEA binding site of AMG211 (MEDI-565, MT111); PSMA binding site of Pasotuxizumab; EpCAM binding site of solitomab; VEGF or angiopoietin 2 binding site of RG7221 or RG7716; Her1 or Her3 binding site of RG7597; Her2 or Her3 binding site of MM111; IGF1R or Her3 binding site of MM141; CD123 binding site of MGDOO6; gpa33 binding site of MGD007; CEA binding site of TF2; CD30 binding site of AFM13; CD19 binding site of AFM11; and Her1 or cMet binding site of LY3164530.

Optionally, the CAR comprises the variable domains of an antigen binding site of an antibody selected from the group consisting of REOPRO® (Abciximab); RITUXAN® (Rituximab); ZENAPAX® (Daclizumab); SIMULECT® (Basiliximab); SYNAGIS® (Palivizumab); REMICADE® (Infliximab); HERCEPTIN® (Trastuzumab); MYLOTARG® (Gemtuzumab ozogamicin); CAMPATH® (Alemtuzumab); ZEVALIN® (Ibritumomab); HUMIRA® (Adalimumab); XOLAIR® (Omalizumab); BEXXAR® (Tositumomab); RAPTIVA® (Efalizumab); ERBITUX® (Cetuximab); AVASTIN® (Bevacizumab); TYSABRI® (Natalizumab); ACTEMRA® (Tocilizumab); VECTIBIX® (Panitumumab); LUCENTIS® (Ranibizumab); SOLIRIS® (Eculizumab); CIMZIA® (Certolizumab); SIMPONI® (Golimumab); ILARIS® (Canakinumab); STELARA® (Ustekinumab); ARZERRA® (Ofatumumab); PROLIA® (Denosumab); NUMAX® (Motavizumab); ABTHRAX® (Raxibacumab); BENLYSTA® (Belimumab); YERVOY® (Ipilimumab); ADCETRIS® (Brentuximab vedotin); PERJETA® (Pertuzumab); KADCYLA® (Ado-trastuzumab); and GAZYVA® (Obinutuzumab).

In an example, the target cell is a blood cell, eg, a stem cell or bone marrow cell of a human or animal. Optionally, the target cell is a B- or T-cell.

In an example, the CAR or TCR comprises an antigen binding site for an autoimmune disease target and the signaling down-regulates cytotoxic activity or proliferation of the immune cells. The term “autoimmune disease” as used herein is defined as a disorder that results from an autoimmune response. An autoimmune disease is the result of an inappropriate and excessive response to a self-antigen. Examples of autoimmune diseases include but are not limited to, Addision's disease, alopecia greata, ankylosing spondylitis, autoimmune hepatitis, autoimmune parotitis, Crohn's disease, diabetes (Type I), dystrophic epidermolysis bullosa, epididymitis, glomerulonephritis, Graves' disease, Guillain-Barr syndrome, Hashimoto's disease, hemolytic anemia, systemic lupus erythaematosus, multiple sclerosis, myasthenia gravis, pemphigus vulgaris, psoriasis, rheumatic fever, rheumatoid arthritis, sarcoidosis, scleroderma, Sjogren's syndrome, spondyloarthropathies, thyroiditis, vasculitis, vitiligo, myxedema, pernicious anemia, ulcerative colitis, among others. Within the overall memory T cell population, several distinct subpopulations have been described and can be recognised by the differential expression of chemokine receptor CCR7 and L-selectin (CD62L). Stem memory T_(SCM) cells, like naive cells, are CD45RO−, CCR7+, CD45RA+, CD62L+(L-selectin), CD27+, CD28+ and IL-7Rα+, but they also express large amounts of CD95, IL-2Rβ, CXCR3, and LFA-1, and show numerous functional attributes distinctive of memory cells. Central memory T_(CM) cells express L-selectin and the CCR7, they secrete IL-2, but not IFNγ or IL-4. Effector memory T_(EM) cells, however, do not express L-selectin or CCR7 but produce effector cytokines like IFNγ and IL-4. Memory T-cells, such as T_(SCM) may be particularly useful for establishing a sustained population of engineered immune cells in the human.

Any immune cell, target cell or stem cell herein can, in an example, be a T_(SCM), T_(CM) or T_(EM) cell, eg, a human T_(SCM), T_(CM) or T_(EM) cell. In an example, the immune cells of the cell therapy (eg, CAR-T cells) each is a progeny of a cell of a human suffering from an autoimmune disease, an inflammatory disease, a viral infection or a cancer, eg, wherein the human is suffering from lymphoblastic leukaemia, ALL (eg, T-ALL), CLL (eg, B-cell chronic lymphocytic leukaemia) or non-Hodgkin's lymphoma. The human may, for example, be the patient or a relative (eg, sibling or parent) thereof.

In an example, the administered immune cells have been engineered for enhanced signaling, wherein the signaling is selected from CD28, 4-1BB, OX40, ICOS and CD40 signaling.

Optionally, the target cells (eg, tumour cells) are killed. In an example, each target cell is a tumour cell and the method treats or reduces the risk of cancer, or treats or reduces the risk of cancer progression in the human.

Optionally, the human has cancer. In an example, the cancer is a haematological cancer. In an example, the human has a cancer of B-cell origin. In an example, the human has a cancer of T-cell origin. For example the cancer is lung cancer, melanoma, breast cancer, prostate cancer, colon cancer, renal cell carcinoma, ovarian cancer, neuroblastoma, rhabdomyosarcoma, leukaemia and lymphoma. Preferred cancer targets for use with the present invention are cancers of B cell origin, particularly including acute lymphoblastic leukaemia, B-cell chronic lymphocytic leukaemia or B-cell non-Hodgkin's lymphoma. In an example, the cancer is a cancer of T-cell or B-cell origin, eg, lymphoblastic leukaemia, ALL (eg, T-ALL), CLL (eg, B-cell chronic lymphocytic leukaemia) or non-Hodgkin's lymphoma. Optionally, each administered immune cell (eg, CAR-cells) is a progeny of an immune cell of said human, eg, wherein the human is suffering from lymphoblastic leukaemia, Diffuse Large B-cell Lymphoma (DLBCL), ALL (eg, T-ALL or B-ALL), CLL (eg, B-cell chronic lymphocytic leukaemia) or non-Hodgkin's lymphoma. Optionally, each administered immune cell (eg, CAR-cells) is an autologous cell (eg, T-cell) of said human or is a progeny of such an autologous cell. As used herein, the term “autologous” is meant to refer to any material derived from the same individual to which it is later to be re-introduced into the individual. “Allogeneic” refers to a graft derived from a different animal of the same species.

Optionally, each administered immune cell (eg, CAR-cells) is derived from a blood or tumour sample of the human and activated and expanded in vitro before step (c). “Activation,” as used herein, refers to the state of a T-cell or other immune cell that has been sufficiently stimulated to induce detectable cellular proliferation. Activation can also be associated with induced cytokine production, and detectable effector functions. The term “activated T cells” refers to, among other things, T cells that are undergoing cell division.

In an embodiment, the human has an autoimmune disease, wherein the immune cells that are administered (eg, CAR-cells) are anergic, or have reduced proliferation and/or cytotoxic activity when bound to target cells, whereby the cell transplant cells (and/or their progeny) compete with endogenous immune cells of said human that up-regulate said autoimmune disease.

The administration of immune cells in the method may be by cell infusion into the blood of the patient. The immune cells may be expanded to produce an expanded immune cell population that is administered to the patient. The immune cells may be activated produce an activated immune cell population that is administered to the patient. In methods herein, an effective amount of immune cells are administered. An “effective amount” as used herein, means an amount which provides a therapeutic or prophylactic benefit to treat or prevent the disease or condition.

In an embodiment of the method of the invention, the method treats or reduces the risk of cancer in a patient (eg, a human), wherein the patient has undergone lymphodepletion before administration of the immune cells to the patient.

In one embodiment, the human is resistant to at least one chemotherapeutic agent.

In one embodiment, the chronic lymphocytic leukaemia is refractory CD 19+ leukaemia and lymphoma.

The invention also includes a method of generating a persisting population of genetically engineered T cells in a human diagnosed with cancer, wherein the administered cells comprise T-cells and the persisting population comprises progeny thereof. In one embodiment, the method comprises administering to a human a T-cell population (eg, a CAR T-cell population), wherein the persisting population of genetically engineered T-cells persists in the human for at least one month after administration. In one embodiment, the persisting population of genetically engineered T-cells comprises a memory T-cell. In one embodiment, the persisting population of genetically engineered T-cells persists in the human for at least three months after administration. In another embodiment, the persisting population of genetically engineered T-cells persists in the human for at least four months, five months, six months, seven months, eight months, nine months, ten months, eleven months, twelve months, two years, or three years after administration.

In one embodiment, the chronic lymphocytic leukaemia is treated. The invention also provides a method of expanding a population of the engineered T-cells or NK cells in a human diagnosed with cancer, wherein the administered cells comprise T-cells and/or NK cells and the expanded population comprises progeny thereof.

Optionally, autologous lymphocyte infusion is used in the treatment. For example, autologous PBMCs are collected from a patient in need of treatment and CAR-T-cells are engineered to express the CAR transmembrane protein, activated and expanded using the methods known in the art and then infused back into the patient in step (a).

In an example, the administered cells are pluripotent or multipotent. The stem cell cannot develop into a human. In an embodiment, the stem cell cannot develop into a human embryo or zygote.

In an example, the administered cell population comprises bone marrow stem cells, eg, human autologous or allogeneic cells.

In an example, the administered cell population comprises haematopoietic stem cells, eg, human autologous or allogeneic cells.

Modifying Microbiota

Medical practice often involves the administration of antibiotics to patients. Such treatments can typically involve administration of broad-spectrum antibiotics, or antibiotics that target many gram-positive bacterial species or many gram-negative species without discrimination. Similarly, use of broad-spectrum antibiotics in farming and agriculture, for example, raise environmental concerns, including entry of such antibiotics into the human and animal food chain which may be deleterious to health and may add to development of microbial resistance. Rather, in an example, the invention involves selective targeting of a first microbial (eg, bacterial or archaeal) species or strain of the microbiota. As shown in the worked examples herein, selective targeting of a particular bacterial species has been achieved using guided nuclease targeting of the genome of the selected species, whilst at the same time sparing related species and strains, as well as species that co-reside (in the Examples species that co-reside in human gut microbiota). Thus, in one example, the step of causing dysbiosis or step (b) comprises killing first cells of a microbiota sub-population or inhibiting growth of said sub-population by using guided nuclease (eg, RNA guided nuclease) targeting to the genome of first cells comprised by a microbiota sub-population. Suitable systems for carrying out the guided nuclease targeting are, for example, engineered CRISPR/Cas systems, TALENs, meganucleases and zinc finger systems. By way of example, CRISPR/Cas-mediated guided targeting of a selected human gut microbiota bacterial species in a consortium is demonstrated in the Examples herein. The targeting produces nuclease cutting of target species or strain DNA, for example, which reduces the relative proportion of the species in the mircrobiota or inhibits growth of the sub-population of said species in the microbiota. Selective targeting of species in the method is generally advantageous to enable finer control over change in the relative proportions of bacterial and/or archaeal species in the microbiota. In this way, the invention provides the ability to alter the microbiota with the aim of influencing the upregulation or downregulation of particular immune cell populations, such as T_(H)1, T_(H)17 and/or T_(reg) cells (be these cells endogenous to the patient and/or comprised by adoptive immune cell populations that are administered to the patient), or other outcomes of modulating the microbiota as described herein.

In an example first cell population growth is reduced by at least 5-fold compared to the growth before said dysbiosis or step (b). The method may comprise inhibiting first cell population growth on a gut surface. The method may comprise inhibiting first cell population growth on a plant (eg, leaf and/or stem) surface.

In an alternative, instead of being applied to a subject, the treatment is applied to an environment or soil (eg, the treatment is a fertiliser, plant growth promoting or inhibiting, herbicide or pesticide treatment), wherein the treatment is modulated by the invention.

It will be readily apparent to the skilled addressee how to determine changes in bacteria and archaea in a gut microbiota or other microbiota. For example, this can be done by analyzing a facecal sample of the patient before and after the treatment. One may determine the types of different species or strains in each sample and the proportion of species or strains before and after treatment. Using conventional analysis of 16s ribosomal RNA-encoding DNA (16s rDNA) it is possible to identify species, for example. Additionally or alternatively, standard biochemical test can be used to identify strains or species, eg, also involving one or more of: staining, motility testing, serological testing, phage typing and identification disc testing (eg using a Kirby Baur disc diffusion method). Biochemical testing may involve one or more of: a (a) Catalase test (b) Coagulase test (c) Oxidase test (d) Sugar fermentation test (e) Indole test (f) Citrate test and (g) Urease test. Relative proportions may be determined by growing colonies on agar plates (as in the Examples herein) from each sample and counting colony numbers.

In an example, the dysbiosis or step (b) increases the proportion of Bacteroides (eg, B fragalis and/or B thetaiotamicron) in the microbiota, eg, gut microbiota.

In an example, the dysbiosis or step (b) decreases the proportion of Bacteroides (eg, B fragalis and/or B thetaiotamicron) in the microbiota, eg, gut microbiota. In an example, the dysbiosis or step (b) increases the proportion of Bacteroidetes to Firmicutes in the microbiota, eg, gut microbiota. In an example, the dysbiosis or step (b) decreases the proportion of Bacteroidetes to Firmicutes in the microbiota, eg, gut microbiota.

Accumulating evidence supports the role of commensal strains of Bifidobacterium and Clostridium spp. belonging to clusters IV and XIVa in the induction of Treg cells. See, eg, Lopez et al. In an example, the dysbiosis or step (b) reduces the proportion of one or more Clostridium species or strain (eg, In an example, each species is a cluster IV or XIVa Clostridium species) in the gut microbiota. In an example, the dysbiosis or step (b) increases the proportion of one or more Clostridium species or strain (eg, In an example, each species is a cluster IV or XIVa Clostridium species) in the gut microbiota.

In an example, the dysbiosis or step (b) reduces the proportion of Bifidobacterium (eg, B bifidum) in the gut microbiota. In an example, the dysbiosis or step (b) increases the proportion of Bifidobacterium (eg, B bifidum) in the gut microbiota.

For example, by selectively altering the human gut microbiota the invention provides for upregulation of CAR-T or other ACT treatment (eg, wherein the altered microbiota downregulates T_(reg) cells in the patient that has received the CAR-T or ACT administration and/or upregulates T_(H)1 and/or T_(H)17 cells in the patient—such cells being comprised by the CAR-T or ACT transplant for example). Downregulating T_(reg) cells may reduce suppression of T-effectors and/or T-helpers in the patient, thereby enhancing the CAR-T or ACT cytotoxicity or other desirable activity against cancer or other disease-mediating cells. Upregulating T_(H)1 and/or T_(H)17 cells may increase T-effector activity, thereby enhancing the CAR-T or ACT cytotoxicity or other desirable activity against cancer or other disease-mediating cells.

In another example, alteration of the microbiota can be used as a switch to dampen down CAR-T or other ACT treatment (eg, wherein the altered microbiota upregulates T_(reg) cells in the patient that has received the CAR-T or ACT administration and/or downregulates T_(H)1 and/or T_(H)17 cells in the patient—such cells being comprised by the CAR-T or ACT transplant for example). Upregulating T_(reg) cells may increase suppression of T-effectors and/or T-helpers in the patient, thereby reducing the CAR-T or ACT ability to promote cytokine release or other undesirable activity. Downregulating T_(H)1 and/or T_(H)17 cells may decrease T-effector activity, thereby reducing the CAR-T or ACT ability to promote cytokine release or other undesirable activity. This may be useful for limiting the risk of cytokine release syndrome (CRS) in the patient. Subsequent further modification of the gut microbiota of the patient using the method of the invention can be performed to upregulate the CAR-T or ACT treatment when it is desired to use this once more to address the disease or condition at hand (eg, a cancer, such as a haematological cancer). In this instance, memory T-cell CAR-T or ACT populations may be present in the patient from the earlier treatment, and the upregulation using microbiota alteration according to the invention may upregulate memory T-cells to differentiate into effector and/or helper cells to address the disease or condition. Thus, in one example, the cell therapy of the invention comprises administering an immune cell population comprising immune memory cells (eg, memory T-cells, such as central memory T cells (T_(CM)) and/or stem cell memory cells (T_(SCM)); and/or the administered population comprises cells that spawn such memory cells following the initial microbiota alteration.

Whilst one aspect of the invention recognizes utility for modulating cell-based therapy in a patient, another aspect recognizes utility for modulating (ie, treating or preventing) cell-mediated diseases and conditions in patients, such as autoimmune and inflammatory diseases and conditions which are mediated, for example by T-cells or other immune cells of the patient. In a further aspect, the invention recognizes utility as a means for modulating (eg, enhancing) another therapy of a disease or condition; for example, for enhancing or effecting therapy with an antibody or anti-viral medicine to treat or prevent the disease or condition. For example, the medicine can be an immune checkpoint antagonist or agonist (eg, for treating or preventing a cancer, such as melanoma or NSCLC). By “effecting therapy” it is contemplated that the patient does not respond or poorly responds to the medicine and the microbiota alteration according to the invention (eg, using selective guided nuclease targeting of a bacterial or archaeal species as described herein) brings about a response (or improved response) to the medicine by the patient. For example, the method of the invention upregulates T_(H)17 cells in a patient suffering from HIV infection. In one aspect, this enhances anti-retroviral therapy or HIV vaccine therapy of the patient. The T_(H)17 cells may be the patient's endogenous cells or cells provided by ACT of the patient. In another example, the method of the invention upregulates T_(H)17 cells in a patient suffering from a cancer (eg, melanoma or lung cancer, such as NSCLC). In one aspect, this enhances immune checkpoint antagonism or agonism therapy of the patient. The T_(H)17 cells may be the patient's endogenous cells or cells provided by ACT of the patient. For example, the therapy is antibody therapy using an antibody selected from ipilimumab (or YERVOY™), tremelimumab, nivolumab (or OPDIVO™), pembrolizumab (or KEYTRUDA™), pidilizumab, BMS-936559, durvalumab and atezolizumab.

The invention relates to guided nuclease systems (eg, engineered CRISPR/Cas systems, TALENs, meganucleases and zinc finger systems), arrays (eg, CRISPR arrays), cRNAs, gRNAs and vectors (eg, phage comprising components of a said system) for use in a method of the invention for targeting the first cells or causing said dysbiosis by inhibiting bacterial or archaeal cell population growth or altering the relative proportion of one or more sub-populations of cells in plant, yeast, environmental, soil, human or animal microbiota, such as for the alteration of the proportion of Bacteroidetes (eg, Bacteroides), Firmicutes and/or gram positive or negative bacteria in gut microbiota of a human. The invention, for example, involves modifying (eg, cutting and/or mutating) one or more target genomic or episomal nucleotide sequences of a host bacterial cell, eg, a Bacteroidetes cell or Firmicutes cell, or a host archaeal cell. In an example, the first bacteria are pathogenic gut bacteria.

There have been a number of studies pointing out that the respective levels of the two main intestinal phyla, the Bacteroidetes and the Firmicutes, are linked to obesity, both in humans and in germ-free mice. The authors of the studies deduce that carbohydrate metabolism is the important factor. They observe that the microbiota of obese individuals are more heavily enriched with bacteria of the phylum Firmicutes and less with Bacteroidetes, and they surmise that this bacterial mix may be more efficient at extracting energy from a given diet than the microbiota of lean individuals (which have the opposite proportions). In some studies, they found that the relative abundance of Bacteroidetes increases as obese individuals lose weight and, further, that when the microbiota of obese mice are transferred to germfree mice, these mice gain more fat than a control group that received microbiota from lean mice. See, eg, Turnbaugh, P. J., R. E. Ley, M. A. Mahowald, V. Magrini, E. R. Mardis, and J. I. Gordon. 2006, “An obesity-associated gut microbiome with increased capacity for energy harvest”, Nature 444:1027-1131. In a further aspect, the invention recognizes utility as a means for enhancing an anti-obesity therapy of a patient, eg, by increasing the ratio of Bacteroidetes versus Firmicutes in the microbiota.

Optionally the first cells are in the presence of cells of a different strain or species, wherein the different cells are Enterobacteriaceae or bacteria that are probiotic, commensal or symbiotic with humans (eg, in the human gut). In an example, each first cell is a Firmicutes, eg, Streptococcus, cell.

In an example, the invention is able to selectively kill or downregulate the target microbes in the microbiota whilst not targeting a second related strain of the same species or a different species that is nevertheless phylogenetically related (as indicated by 16s rDNA). For example, the microbiota comprises cells of a second bacterial species or strain, or archaeal species or strain, wherein the second species or strain has a 16s ribosomal RNA-encoding DNA sequence that is at least 80, 85, 90, 95, 96, 97, 98 or 99% identical to an 16s ribosomal RNA-encoding DNA sequence of the first cell species or strain, wherein the growth of the second cells in the microbiota is not inhibited by said method. In an embodiment, the growth of second strain or species is not inhibited; or the growth of said first cells is inhibited by at least 2×, 3×, 4×, 5×, 6×, 7×, 8×, 9×, 10×, 50×, 100× or 1000× the growth inhibition of the second cells.

In one aspect of the method, causing the dysbiosis or step (b) comprises altering the proportion of a sub-population of first cells (host cells) in the microbiota, eg, gut microbiota, of the patient, thereby producing an altered gut microbiota that modulates the immune cell therapy in the patient, wherein the sub-population comprises host cells of said first species or strain, the method comprising using guided nuclease (eg RNA-guided nuclease) cutting of a respective target sequence in host cells to modify the target sequences, whereby host cells are killed or the host cell population growth is reduced, thereby reducing the proportion of said sub-population in the microbiota. Suitable systems for carrying out the guided nuclease cutting are, for example, engineered CRISPR/Cas systems, TALENs, meganucleases and zinc finger systems. By way of example, CRISPR/Cas-mediated guided cutting of a selected human gut microbiota bacterial species in a consortium is demonstrated in the Examples herein.

In an example, the target sequence modification is carried out by

-   -   a. combining the microbiota with multiple copies of engineered         nucleic acid sequences encoding host modifying (HM) crRNAs, and     -   b. expressing HM-crRNAs in host cells,     -   wherein each engineered nucleic acid sequence is operable with a         Cas nuclease in a respective host cell to form a HM-CRISPR/Cas         system and the engineered sequence comprises     -   (i) spacer and repeat sequences encoding a HM-crRNA;     -   (ii) the HM-crRNA comprising a sequence that is capable of         hybridizing to a host cell target sequence to guide Cas nuclease         to the target sequence in the host cell; and     -   optionally the HM-system comprises a tracrRNA sequence or a DNA         sequence expressing a tracrRNA sequence;     -   whereby HM-crRNAs guide Cas modification of host target         sequences in host cells, whereby host cells are killed or the         host cell population growth is reduced, thereby reducing the         proportion of said sub-population in the microbiota.

In an alternative, HM-crRNA and tracrRNA are comprised by a single guide RNA (gRNA). In an example, each engineered nucleic acid sequence is comprised by a respective vector, wherein each vector is optionally a plasmid (eg, a conjugative plasmid capable of transfer into a host cell), phage, phagemid or prophage. The phage is capable of infecting a said host cell.

In an example, endogenous Cas nuclease of host cells is used for modification of target nucleotide sequences. In an embodiment, therefore, each vector lacks a Cas (eg, a Cas9) nuclease-encoding sequence. By harnessing endogenous Cas nuclease, embodiments of the invention use endogenous Cas nuclease activity (ie, without the need for prior genetic modification of the host cell to activate or enhance the nuclease activity). Thus, in an example, the Cas nuclease is encoded by a wild-type gene of the host cell. In an example, the nuclease is active to achieve the cell killing or growth reduction without inhibition of an endogenous Cas nuclease (or Cas nuclease gene) repressor in the host cell. Thus, the invention can address wild-type bacterial populations without the need for prior manipulation to make bring about effective Cas-mediated cell killing or growth reduction. Thus, the population can be exposed to the cRNA when the population is in its wild-type environment (such as comprised by a plant, yeast, environmental, soil, human or animal microbiome).

In an example, the cRNA or gRNA is for administration to (or administered to) a human or non-human animal patient by mucosal, gut, oral, intranasal, intrarectal or buccal administration.

Optionally said Cas nuclease is provided by an endogenous Type II CRISPR/Cas system of each first cell. Optionally, the tracrRNA sequence or DNA sequence expressing a tracrRNA sequence is endogenous to each host cell. Optionally, each target sequence is comprised by an antibiotic resistance gene, virulence gene or essential gene of the respective host cell, for example the target sequences are identical between the host cells. Optionally, the engineered nucleic acid sequences are comprised by an antibiotic composition, wherein the sequences are in combination with an antibiotic agent (first antibiotic), and in an example the target sequences are comprised by an antibiotic resistance gene wherein the antibiotic is said first antibiotic. The antibiotic composition is administered to the patient or subject to effect said dysbiosis or step (b).

Optionally, each host cell comprises a deoxyribonucleic acid strand with a free end (HM-DNA) encoding a HM-sequence of interest and/or wherein the method comprising into the host cells such a sequence encoding the HM-DNA, wherein the HM-DNA comprises a sequence or sequences that are homologous respectively to a sequence or sequences in or flanking the target sequence for inserting the HM-DNA into the host genome (eg, into a chromosomal or episomal site).

The invention also provides vectors for introducing into first cells (host cells) for carrying out the treatment or prevention method of the invention, wherein each vector is:

An engineered nucleic acid vector for modifying a bacterial or archaeal host cell comprising an endogenous CRISPR/Cas system, the vector comprising nucleic acid sequences for expressing a plurality of different crRNAs (eg, gRNAs) for use in causing the dysbiosis or for use in step (b) of the method; and optionally lacking a nucleic acid sequence encoding a Cas nuclease, wherein a first of said crRNAs is capable of hybridising to a first nucleic acid sequence in said host cell; and a second of said crRNAs is capable of hybridising to a second nucleic acid sequence in said host cell, wherein said second sequence is different from said first sequence; and

-   -   a. the first sequence is comprised by an antibiotic resistance         gene (or RNA thereof) and the second sequence is comprised by an         antibiotic resistance gene (or RNA thereof); optionally wherein         the genes are different;     -   b. the first sequence is comprised by an antibiotic resistance         gene (or RNA thereof) and the second sequence is comprised by an         essential or virulence gene (or RNA thereof);     -   c. the first sequence is comprised by an essential gene (or RNA         thereof) and the second sequence is comprised by an essential or         virulence gene (or RNA thereof); or     -   d. the first sequence is comprised by a virulence gene (or RNA         thereof) and the second sequence is comprised by an essential or         virulence gene (or RNA thereof).

Each vector may be as described above, eg, a phage capable of infecting a host cell or conjugative plasmid capable of introduction into a host cell. In an example, the vectors are in combination with an antibiotic agent (eg, a beta-lactam antibiotic).

Each first cell (host cell) may be a Staphylococcus, Streptococcus, Pseudomonas, Salmonella, Listeria, E coli, Desulfovibrio or Clostridium host cell. In an example, each first cell (host cell) is a Firmicutes cell, eg, a Staphylococcus, Streptococcus, Listeria or Clostridium cell.

In an example, each engineered nucleic acid sequence comprises a sequence R1-S1-R1′ for expression and production of the respective crRNA (eg, comprised by a single guide RNA) in the host cell, (i) wherein R1 is a first CRISPR repeat, R1′ is a second CRISPR repeat, and R1 or R1′ is optional; and (ii) S1 is a first CRISPR spacer that comprises or consists of a nucleotide sequence that is 95% or more identical to said target sequence.

In an example, R1 and R1′ are at least 95% identical respectively to the first and second repeat sequences of a CRISPR array of the host cell species. In an example, R1 and R1′ are at least 95% (eg, 96, 97, 98, 99 or 100%) identical respectively to the first (5′-most) and second (the repeat immediately 3′ of the first repeat) repeat sequences of a CRISPR array of said species, eg, of a said host cell of said species. In an example, R1 and R1′ are functional with a Type II Cas9 nuclease (eg, a S thermophilus, S pyogenes or S aureus Cas9) or Type I Cas3 to modify the target in a said host cell.

In one aspect, the method involves the following use, as demonstrated by the worked experimental Example:

The use of wild-type endogenous Cas nuclease activity of the first cell (host cell) population to inhibit growth of the population, wherein each host cell has an endogenous CRISPR/Cas system having wild-type Cas nuclease activity, the use comprising transforming host cells of the population, wherein each transformed host cell is transformed with an engineered nucleotide sequence for providing host modifying (HM) cRNA or guide RNA (gRNA) in the host cell, the HM-cRNA or gRNA comprising a sequence that is capable of hybridising to a host cell target protospacer sequence for guiding endogenous Cas to the target, wherein the cRNA or gRNA is cognate to an endogenous Cas nuclease of the host cell that has said wild-type nuclease activity and following transformation of the host cells growth of the population is inhibited.

By “cognate to” it is intended that the endogenous Cas is operable with crRNA or gRNA sequence to be guided to the target in the host cell. The skilled addressee will understand that such Cas guiding is generally a feature of CRISPR/Cas activity in bacterial and archaeal cells, eg, wild-type CRISPR/Cas activity in bacterial or archaeal cells having endogenous active wild-type CRISPR/Cas systems.

By “wild-type” Cas activity it is intended, as will be clear to the skilled addressee, that the endogenous Cas is not an engineered Cas or the cell has not been engineered to de-repress the endogenous Cas activity. This is in contrast to certain bacteria where Cas nuclease activity is naturally repressed (ie, there is no wild-type Cas nuclease activity or none that is useful for the present invention, which on the contrary is applicable to addressing wild-type host cells in situ for example where the endogenous Cas activity can be harnessed to effect cell population growth inhibition).

In the worked Examples below, inhibition was addressed in a bacterial population (a gram positive Firmicutes) on a solid surface. A >10-fold inhibition of host cell population growth was achieved. Targeting was directed to an antibiotic resistance gene and an essential gene. The demonstration of the invention's ability to inhibit host cell growth on a surface is important and desirable in embodiments where the invention is for treating or preventing diseases or conditions mediated or caused by microbiota as disclosed herein in a human or animal subject. Such microbiota are typically in contact with tissue of the subject (eg, gut, tissue) and thus we believe that the demonstration of activity to inhibit growth of a microbiota bacterial species (exemplified by Streptococcus) on a surface supports this utility. Targetig microbiota on plant surfaces is also a desired application.

In an example, inhibition of first cell (host cell) population growth is at least 2, 3, 4, 5, 6, 7, 8, 9 or 10-fold compared to the growth of cells of the same species or strain not exposed to said engineered nucleotide sequence. For example, growth inhibition is indicated by a lower bacterial colony number of a first sample of host cells (alone or in a mixed bacterial population, eg, a microbiota or faecal sample of the patient after treatment) by at least 2, 3, 4, 5, 6, 7, 8, 9 or 10-fold compared to the colony number of a second sample of the host cells (alone or in a mixed bacterial population, eg, a microbiota or faecal sample of the patient before treatment), wherein the first cells have been transformed by said engineered nucleotide sequence but the second sample has not been exposed to said engineered nucleotide sequence. In an embodiment, the colony count is determined 12, 24, 36 or 48 hours after the first sample has been exposed to the engineered sequence. In an embodiment, the colonies are grown on solid agar in vitro (eg, in a petri dish). It will be understood, therefore, that growth inhibition can be indicated by a reduction (<100% growth compared to no treatment, ie, control sample growth) in growth of first (host) cells or populations, or can be a complete elimination of such growth. In an example, growth of the host cell population is reduced by at least 10, 20, 30, 40, 50, 60, 70, 80, 90 or 95%, ie, over a predetermined time period (eg, 24 hours or 48 hours following combination with the cRNA or gRNA, TALEN, meganuclease, zinc finger etc in the host cells), ie, growth of the host cell population is at least such percent lower than growth of a control host cell population that has not been exposed to said cRNA or gRNA etc but otherwise has been kept in the same conditions for the duration of said predetermined period. In an example, percent reduction of growth is determined by comparing colony number in a sample of each population at the end of said period (eg, at a time of mid-exponential growth phase of the control sample). For example, after exposing the test population to the crRNA or gRNA etc at time zero, a sample of the test and control populations is taken and each sample is plated on an agar plate and incubated under identical conditions for said predetermined period. At the end of the period, the colony number of each sample is counted and the percentage difference (ie, test colony number divided by control colony number and then times by 100, and then the result is subtracted from 100 to give percentage growth reduction). The fold difference is calculated by dividing the control colony number by the test colony number.

Inhibition of population growth can be indicated, therefore, by a reduction in proliferation of first (host) cell number in the population. This may be due to cell killing by the nuclease and/or by downregulation of host cell proliferation (division and/or cell growth) by the action of the nuclease on the target protospacer sequence. In an embodiment of a treatment or prevention as disclosed herein, host cell burden of the human or animal subject is reduced, whereby the disease or condition is treated (eg, reduced or eliminated) or prevented (ie, the risk of the subject developing the disease or condition) is reduced or eliminated.

In an example, wild-type host cell endogenous Cas9 or cfp1 activity is used. In an example, wild-type host cell endogenous Cas3 and/or CASCADE activity is used The engineered nucleotide sequence may not be in combination with an exogenous Cas nuclease-encoding sequence. Optionally, said Cas nuclease is a nickase.

In an example, the formation of bacterial colonies of said host cells is inhibited following said dysbiosis or step (b). In an example, proliferation of host cells is inhibited following said dysbiosis or step (b). In an example, host cells are killed following said dysbiosis or step (b).

In another aspect, the method comprises producing ex vivo a medicament for administration to the patient for causing said dysbiosis or step (b) for treating or preventing the disease or condition, wherein the medicament comprises a modified mixed bacterial population (eg, obtained from faeces or gut microbiota of one or more human donors or said patient), wherein the modified population is administered to the patient to cause said dysbiosis or in step (b) to alter the balance of species or strains in the patient's gut microbiota, thereby altering the proportion of the first cells in the gut microbiota. The modified mixed population can be produced ex vivo using guided nuclease modification techniques as described herein. Thus, for example, the method can be used to reduce the proportion of a specific Firmicutes sub-population and spare Bacteroidetes in the mixed population, eg, for producing a medicament for treating or preventing a metabolic or GI condition or disease disclosed herein. In this way, the invention can use a modified bacterial transplant (eg, a modified faecal transplant) medicament for such use or for said treatment or prevention in a human or animal. For example, the method can be used to modify one or more microbiota in vitro to produce a modified collection of bacteria for administration to a human or animal for medical use (eg, treatment or prevention of a metabolic condition (such as obesity or diabetes) or a GI tract condition (eg, any such condition mentioned herein) or a cancer (eg, a GI tract cancer). In an example, the transformation of bacterial cells with phage or plasmid vectors comprising engineered nucleic acid sequences as described herein is carried out in vitro, or the engineered nucleotide sequence is comprised by nucleic acid that is electroporated into host cells. In an example, the nucleic acid are RNA (eg, copies of the gRNA). In another example, the nucleic acid are DNA encoding the crRNA or gRNA for expression thereof in host cells.

Thus, in an example, the invention provides an engineered nucleotide sequence for providing host cell modifying (HM) cRNA or guide RNA (gRNA) in a population of wild-type bacterial host cells comprised by a microbiota of a plant, yeast, environmental, soil, human or animal subject for use in the method of the invention, the cRNA or gRNA comprising a sequence that is capable of hybridising to a host cell target protospacer sequence for guiding Cas to the target, wherein the cRNA or gRNA is cognate to an endogenous host cell Cas nuclease that has wild-type nuclease activity, wherein following transformation of host cells growth of the population is inhibited and the disease or condition is treated or prevented, or the therapy or treatment is modulated.

In an example, the engineered nucleotide sequence comprises a HM-CRISPR array. In an example, the engineered nucleotide sequence encodes a single guide RNA. In an example, the engineered nucleotide sequence is a guide RNA (eg, a single guide RNA) or crRNA. In an example, the engineered sequence is comprised by a bacteriophage that is capable of infecting the host cells, wherein the transformation comprises transduction of the host cells by the bacteriophage. The bacteriophage can be a phage as described herein. In an example, the engineered nucleotide sequence is comprised by a plasmid (eg, a conjugative plasmid) that is capable of transforming host cells. The plasmid can be a plasmid as described herein. In an example, the engineered nucleotide sequence is comprised by a transposon that is capable of transfer into and/or between host cells. The transposon can be a transposon as described herein.

Any method of the invention can comprise transforming host cells with nucleic acid vectors for producing cRNA or gRNA in the cells. For example, the vectors or nucleic acid comprising the engineered nucleotide sequence are administered orally, intravenously, topically, ocularly, intranasally, by inhalation, by rectal administration, or by any other route of administration disclosed herein or otherwise to the patient, wherein the administration transforms the first (host) cells with the vectors or nucleic acid.

In an example, the first are mixed with second bacteria in the microbiota of the patient or subject. Optionally, the second bacteria species is E coli, L lactis or S thermophilus, as shown in the worked Example below, such are strains that co-exist symbiotically in human and animal gut microbiota. The Example also addresses targeting in a mixed gram positive and gram negative bacterial population. Additionally, the Example addresses a population of Firmicutes (S thermophilus) and a population of Enterobacteriaceae (E coli), both of which are found in human microbiota. Other examples of Enterobacteriaceae are Salmonella, Yersinia pestis, Klebsiella, Shigella, Proteus, Enterobacter, Serratia, and Citrobacter.

In an example, the condition or disease is a metabolic or gastrointestinal disease or condition, eg, obesity, IBD, IBS, Crohn's disease or ulcerative colitis. In an example, the condition or disease is a cancer, eg, a solid tumour or a GI cancer (eg, stomach cancer), liver cancer or pancreatic cancer. In an example, the condition is resistance or reduced responsiveness to an antibiotic (eg, any antibiotic disclosed herein).

In an example, each first (host) cell comprises an endogenous RNase III that is operable with the engineered sequence in the production of said HM-crRNA in the cell. In an alternative, one or more of the vectors comprises a nucleotide sequence encoding such a RNase III for expression of the RNase III in the host cell.

In an example, the essential gene (comprising the target) encodes a DNA polymerase of the cell. This is exemplified below.

In an example, the cRNA or gRNA comprises a sequence that is capable of hybridising to a host cell target protospacer sequence that is a adjacent a NGG, NAG, NGA, NGC, NGGNG, NNGRRT or NNAGAAW protospacer adjacent motif (PAM), eg, a AAAGAAA or TAAGAAA PAM (these sequences are written 5′ to 3′). In an embodiment, the PAM is immediately adjacent the 3′ end of the protospacer sequence. In an example, the Cas is a S aureus, S theromophilus or S pyogenes Cas. In an example, the Cas is Cpf1 and/or the PAM is TTN or CTA.

In an example, each engineered nucleotide sequence or vector comprises a said CRISPR array or a sequence encoding a said crRNA or gRNA and further comprises an antibiotic resistance gene (eg, kanamycin resistance), wherein the HM-crRNA or gRNA does not target the antibiotic resistance gene. In an example, the target sequence is comprised by an antibiotic resistance gene of the host cell, wherein the antibiotic is different from the first antibiotic (eg, kanamycin). In this way, the engineered sequence or vector is able to target the host without targeting itself. By exposing the host cells to the first antibiotic (eg, by orally or intravenously administering it to the patient), one can promote retention of the engineered sequence or vector therein by positive selection pressure since cells containing the first antibiotic resistance gene will have a survival advantage in the presence of the first antibiotic (when host cells that are not transformed by the engineered sequence or vectors are not resistant to the first antibiotic). Thus, an example provides: The method of the invention comprising exposing the first (host) cell population to said antibiotic (eg, kanamycin) and said engineered sequence or vector(s), for promoting maintenance of cRNA or gRNA-encoding sequences in host cells; or the engineered sequence, array or vector of the invention is in combination with said antibiotic.

In an example the sequence encoding the cRNA or gRNA is under a constitutive promoter (eg, a strong promoter) operable in the host cell species, or an inducible promoter.

In an example, the or each first (host) cell is a gram positive cell. In another example, the or each first (host) cell is a gram positive cell.

The invention also provides: An ex vivo mixed population of microbiota bacteria obtainable by the method by isolation of a gut microbiota sample from the patient after carrying out the method, or by isolation of a faecal sample of the patient after carrying out the method. In an example, the mixed population is in a container for medical or nutritional use. For example, the container is a sterilised container, eg, an inhaler, intranasal delivery device or connected to a syringe or IV needle. In an example, the mixed population is useful for administration to a human or animal to populate a microbiome thereof for treating a disease or condition (eg, a disease or condition disclosed herein).

Herein, in an example the Bacteroides is a species selected from caccae, capillosus, cellulosilyticus, coprocola, coprophilus, coprosuis, distasonis, dorei, eggerthii, faecis, finegoldii, fluxus, fragalis, intestinalis, melaninogenicus, nordii, oleiciplenus, oralis, ovatus, pectinophilus, plebeius, stercoris, thetaiotaomicron, uniformis, vulgatus and xylanisolvens. For example, the Bacteroides is thetaiotaomicron. In an example, the first (host cell) population or second bacteria comprise a plurality of different Bacteroidetes species, or a plurality of Bacteroides species (eg, comprising B thetaiotaomicron and B fragalis), or Bacteroides and Prevotella species. Herein, in an example, the Prevotella is a species selected from bergensis, bivia, buccae, buccalis, copri, melaninogenica, oris, ruminicola, tannerae, timonensis and veroralis. In an alternative, the first (host) cells or second bacteria are Firmicutes cells, for example comprising or consisting of one or more Firmicutes selected from Anaerotruncus, Acetanaerobacterium, Acetitomaculum, Acetivibrio, Anaerococcus, Anaerofilum, Anaerosinus, Anaerostipes, Anaerovorax, Butyrivibrio, Clostridium, Capracoccus, Dehalobacter, Dialister, Dorea, Enterococcus, Ethanoligenens, Faecalibacterium, Fusobacterium, Gracilibacter, Guggenheimella, Hespellia, Lachnobacterium, Lachnospira, Lactobacillus, Leuconostoc, Megamonas, Moryella, Mitsuokella, Oribacterium, Oxobacter, Papillibacter, Proprionispira, Pseudobutyrivibrio, Pseudoramibacter, Roseburia, Ruminococcus, Sarcina, Seinonella, Shuttleworthia, Sporobacter, Sporobacterium, Streptococcus, Subdoligranulum, Syntrophococcus, Thermobacillus, Turibacter and Weisella. In an example, the first (host) cells or second bacteria comprise or consist of Clostridium (eg, dificile) cells (and optionally the other sub-population consists of Bacteroides (eg, thetaiotaomicron) cells). In an example, the first (host) cells or second bacteria comprise or consist of Enterococcus cells (and optionally the other cells consist of Bacteroides (eg, thetaiotaomicron) cells). In an example, the first (host) cells or second bacteria comprise or consist of Ruminococcus cells (and optionally the other cells consist of Bacteroides (eg, thetaiotaomicron) cells). In an example, the first (host) cells or second bacteria comprise or consist of Streptococcus cells (and optionally the other cells consist of Bacteroides (eg, thetaiotaomicron) cells). In an example, the first (host) cells or second bacteria comprise or consist of Faecalibacterium cells (and optionally the other cells consist of Bacteroides (eg, thetaiotaomicron) cells). For example, the Faecalibacterium is a Faecalibacterium prausnitzii (eg, A2-165, L2-6, M21/2 or SL3/3).

In an example, the first (host) cells or second bacteria consist of Streptococcus cells (optionally S thermophilus and/or pyogenes cells) and the second bacteria consists of Bacteroides (eg, thetaiotaomicron) and/or Enterobacteriaceae (eg, E coli) cells.

In an example, the first (host) cells are infectious disease pathogens of humans, an animal (eg, non-human animal) or a plant.

In an example, the first (host) cells are selected from a species of Escherichia (eg, E coli O157:H7 or O104: H4), Shigella (eg, dysenteriae), Salmonella (eg, typhi or enterica, eg, serotype typhimurium, eg, DT 104), Erwinia, Yersinia (eg, pestis), Bacillus, Vibrio, Legionella (eg, pneumophilia), Pseudomonas (eg, aeruginosa), Neisseria (eg, gonnorrhoea or meningitidis), Bordetella (eg, pertussus), Helicobacter (eg, pylori), Listeria (eg, monocytogenes), Agrobacterium, Staphylococcus (eg, aureus, eg, MRSA), Streptococcus (eg, pyogenes or thermophilus), Enterococcus, Clostridium (eg, dificile or botulinum), Corynebacterium (eg, amycolatum), Mycobacterium (eg, tuberculosis), Treponema, Borrelia (eg, burgdorferi), Francisella, Brucella, Campylobacter (eg, jejuni), Klebsiella (eg, pneumoniae), Frankia, Bartonella, Rickettsia, Shewanella, Serratia, Enterobacter, Proteus, Providencia, Brochothrix, Bifidobacterium, Brevibacterium, Propionibacterium, Lactococcus, Lactobacillus, Pediococcus, Leuconostoc, Vibrio (eg, cholera, eg, O139, or vulnificus), Haemophilus (eg, influenzae), Brucella (eg, abortus), Franciscella, Xanthomonas, Erlichia (eg, chaffeensis), Chlamydia (eg, pneumoniae), Parachlamydia, Enterococcus (eg, faecalis or faceim, eg, linezolid-resistant), Oenococcus and Acinetoebacter (eg, baumannii, eg, multiple drug resistant).

In an example, the first (host) cells are Staphylococcus aureus cells, eg, resistant to an antibiotic selected from methicillin, vancomycin-resistant and teicoplanin.

In an example, the first (host) cells are Pseudomonas aeuroginosa cells, eg, resistant to an antibiotic selected from cephalosporins (eg, ceftazidime), carbapenems (eg, imipenem or meropenem), fluoroquinolones, aminoglycosides (eg, gentamicin or tobramycin) and colistin.

In an example, the first (host) cells are Klebsiella (eg, pneumoniae) cells, eg, resistant to carbapenem.

In an example, the first (host) cells are Streptococcus (eg, pneumoniae or pyogenes) cells, eg, resistant to an antibiotic selected from erythromycin, clindamycin, beta-lactam, macrolide, amoxicillin, azithromycin and penicillin.

In an example, the first (host) cells are Salmonella (eg, serotype Typhi) cells, eg, resistant to an antibiotic selected from ceftriaxone, azithromycin and ciprofloxacin.

In an example, the first (host) cells are Shigella cells, eg, resistant to an antibiotic selected from ciprofloxacin and azithromycin.

In an example, the first (host) cells are Mycobacterium tuberculosis cells, eg, resistant to an antibiotic selected from Resistance to isoniazid (INH), rifampicin (RMP), fluoroquinolone, amikacin, kanamycin and capreomycin.

In an example, the first (host) cells are Enterococcus cells, eg, resistant to vancomycin.

The method of claim 13, wherein all of the host cells are Enterobacteriaceae cells, eg, resistant to an antibiotic selected from a cephalosporin and carbapenem.

In an example, the first (host) cells are E. coli cells, eg, resistant to an antibiotic selected from trimethoprim, itrofurantoin, cefalexin and amoxicillin.

In an example, the first (host) cells are Clostridium (eg, dificile) cells, eg, resistant to an antibiotic selected from fluoroquinolone antibiotic and carbapenem.

In an example, the first (host) cells are Neisseria gonnorrhoea cells, eg, resistant to an antibiotic selected from cefixime (eg, an oral cephalosporin), ceftriaxone (an injectable cephalosporin), azithromycin and tetracycline.

In an example, the first (host) cells are Acinetoebacter baumannii cells, eg, resistant to an antibiotic selected from beta-lactam, meropenem and a carbapenem.

In an example, the first (host) cells are Campylobacter cells, eg, resistant to an antibiotic selected from ciprofloxacin and azithromycin.

In an example, the second species or strain is a human gut commensal species or strain and/or a human gut probiotic species or strain.

In an example, the second species or strain is a Bacteroidetes (eg, Bacteroides) and optionally the host cells are gram positive bacterial cells.

In an example, the first cells are Firmicutes cells.

In an example, causing said dysbiosis or step (b) is carried out by targeting the sub-population of first cells by administering thereto an anti-bacterial or anti-archaeal agent simultaneously or sequentially with said immune cell population, whereby first cells are killed or the sub-population growth is reduced, thereby reducing the proportion of said sub-population in the gut microbiota of the patient.

In an example, the method reduces first (host) cell population growth by at least 5, 10, 20, 50 or 100-fold compared to the growth of a control population of host cells that have not received said guided nuclease (eg, Cas) modification.

In an example, the method inhibits host cell population growth on a gut surface.

In an example, for each host cell the system comprises components according to (i) to (iv):—

(i) at least one nucleic acid sequence encoding a Cas nuclease; (ii) an engineered HM-CRISPR array comprising a spacer sequence and repeats encoding a HM-crRNA, the HM-crRNA comprising a sequence that hybridises to a host cell target sequence to guide said Cas to the target in the host cell to modify the target sequence; (iii) an optional tracrRNA sequence or a DNA sequence expressing a tracrRNA sequence; (iv) wherein said components of the system are split between the host cell and at least one nucleic acid vector that transforms the host cell, whereby the HM-crRNA guides Cas to the target to modify the host target sequence in the host cell; and wherein the target sequence is modified by the Cas whereby the host cell is killed or host cell growth is reduced; the method comprising introducing the vectors of (iv) into host cells and expressing said HM-crRNA in the host cells, allowing HM-cRNA to hybridise to host cell target sequences to guide Cas to the targets in the host cells to modify target sequences, whereby host cells are killed or host cell growth is reduced, thereby altering the proportion of said sub-population in the microbiota.

In an example, component (i) is endogenous to each host cell.

In an example, each vector is a virus or phage.

In an example, each target sequence is adjacent a NNAGAAW or NGGNG protospacer adjacent motif (PAM).

In an example, alternatively HM-crRNA and tracrRNA are comprised by a single guide RNA (gRNA), the method comprising introducing said gRNA into host cells or expressing the gRNA in host cells.

In an example, the microbiota comprises a second bacterial or archaeal species, wherein each of the first and second species is a respective species of the same phylum (eg, both Firmicutes species) and the growth of the second bacteria is not inhibited by the HM-system; or wherein the microbiota comprises a second bacterial or archaeal strain, wherein each of the first and second bacteria or archaea is a respective strain of the same species and the growth of the second bacteria or archaea is not inhibited by the HM-system.

In an example, the microbiota comprises a second bacterial species, wherein each of the first and second species is a respective gram-positive species and the growth of the second bacteria is not inhibited by the HM-system.

In an example, each target sequence is comprised by an antibiotic resistance gene, virulence gene or essential gene of the host cell.

In an example, each first cell is a Staphylococcus, Streptococcus, Pseudomonas, Salmonella, Listeria, E coli, Desulfovibrio, Vibrio or Clostridium cell.

In an example, the dysbiosis or step (b) comprises stimulating Paneth cells of the patient by gut Bacteroides (eg, B thetaiotamicron), wherein the altered microbiota produced by the dysbiosis or step (b) comprises an increased proportion of Bacteroides first bacteria compared with the microbiota before the dysbiosis or step (b), whereby Paneth cells are stimulated and the cell therapy is modulated.

Bacteroides can affect expression of Paneth cell proteins. Small intestinal crypts house stem cells that serve to constantly replenish epithelial cells that die and are lost from the villi. Paneth cells (immune systems cells similar to neutrophils), located adjacent to these stem cells, protect them against microbes by secreting a number of antimicrobial molecules (defensins) into the lumen of the crypt, and it is possible that their protective effect even extends to the mature cells that have migrated onto the villi. In animal models, B. thetaiotaomicron can stimulate production of an antibiotic Paneth cell protein (Ang4) that can kill certain pathogenic organisms (e.g., Listeria monocytogenes). Listeria monocytogenes is a strong T_(H)1 cell inducer, and thus by stimulating Paneth cells in certain aspects of the invention, this may be useful to skew immunity from TH1 to other cell types, such as T_(H)17. This may be useful for increasing or enhancing the immune cell therapy of the invention. For example, this may be useful when the invention comprises administering T_(H)17-based cell therapy (eg, CAR-T_(H)17 cells) to the patient.

In an example, the dysbiosis or step (b) comprises developing an immune response in the patient to gut Bacteroides (eg, B thetaiotamicron), wherein the altered microbiota produced by the dysbiosis or step (b) comprises an increased proportion of Bacteroides first bacteria compared with the microbiota before the dysbiosis or step (b), whereby the cell therapy is modulated.

In an example, the dysbiosis or step (b) comprises altering the relative proportion of a or said sub-population of first cells in the gut microbiota of the patient, thereby producing an altered gut microbiota that modulates the immune cell therapy in the patient, wherein the dysbiosis or step (b) comprises killing first cells of said sub-population or inhibiting growth of said sub-population by using guided nuclease targeting to the genome of first cells comprised by the sub-population.

The invention also provides: A bacterial or archaeal transplant for administration to a patient for therapy of a disease or condition in the patient using the method of the invention. Optionally the transplant comprises cells of said first species. Optionally the transplant comprises cells of said second species (and eg, does not comprise cells of the first species).

The invention also provides: A bacterial or archaeal transplant for administration to a subject (eg, a plant or yeast) or to soil or an environment for modulating a treatment thereof using the method of the invention. Optionally the transplant comprises cells of said first species. Optionally the transplant comprises cells of said second species (and eg, does not comprise cells of the first species).

In an example, the yeast comprises a population of yeast cells of the same species or strain. For example, the yeast is comprised by the microbiota, eg, the yeast comprises a sub-population of cells of the microbiota, such as where the targeted cells are bacteria or archaea cells also comprised by the microbiota. In an embodiment, the method kills the targeted cells (eg, bacteria) or reduces growth of the target cell sub-population comprised by the microbiota, wherein release of (or the concentration of) one or more chemicals or messengers by target cells in the microbiota is reduced. For example, the one or more chemicals or messengers that mediate quorum sensing in microbes (eg, bacteria) of the microbiota is reduced. This may be useful to shape the growth of target cell and/or other microbial cell populations in the microbiota. In an example, the one or more chemicals or messengers inhibit growth of the yeast or kill the yeast, and thus reduction of the release or concentration of the chemical or messenger(s) in the microbiota is advantageous to promote growth and/or maintenance of the yeast in the microbiota. In an embodiment of these examples, the treatment is nutrition of the yeast or treatment of the yeast with a growth promoter (eg, wherein the yeast are for foodstuff or beverage production, or for production of a biotechnology or medical product, such as an antibody eg, the yeast is Saccharaomyces). In another example, the chemical or messenger(s) promote yeast growth, wherein the yeast treatment is treatment with a yeast killing agent (eg, an fungicide). This is useful to promote efficacy of the killing treatment when the yeast are undesirable (eg, an undesirable mould). In an example when the subject is a plant, the one or more chemicals or messengers inhibit growth of the plant or kill the plant, and thus reduction of the release or concentration of the chemical or messenger(s) in the microbiota is advantageous to promote growth of the plant and/or inhibit killing of the plant. In an embodiment of these examples, the treatment is nutrition of the plant or treatment of the yeast with a fertilizer or nitrogen fixing agent. In an embodiment, the treatment is a pesticide treatment of the plant, such as a treatment that is inhibited or reduced in the presence of the targeted microbiota cells.

In an example, the plant is a crop plant (eg, wheat, barley, cereal or livestock fodder plant), fruit plant (eg, apple, orange, citrus, lime, lemon, raspberry, strawberry, berry or banana plant), legume plant, sugar cane plant, spice plant, garden plant, vegetable plant, grass, tree or flowering plant. For example, the plant is a tuber plant, eg, a potato or a sweet potato (eg, and the first, host or targeted bacteria are Pectobacterium atrosepticum cells, optionally wherein the treatment is storage (eg, cold storage), washing, a pesticide or herbicide treatment, fertilising or hydrating of the plant of a crop thereof (eg, a potato crop)). For example, the plant is a tobacco plant (eg, and the first, host or targeted bacteria are Ralstonia solanacearum cells, optionally wherein the treatment is storage (eg, cold storage), washing, a pesticide or herbicide treatment, fertilising or hydrating of the plant of a crop thereof (eg, a tobacco leaf crop)).

In an example, the subject is a protozoa. In an example, the subject or patient is a fish. In an example, the subject or patient is a bird. In an example, the subject or patient is a reptilie. In an example, the subject or patient is an arachnid. In an example, the subject is a yeast cell (eg, a Saccharomyces cell). In an example, the subject or patient is an animal (eg, a rodent, mouse or rat). In an example, the subject or patient is a human (eg, an embryo or not an embryo). In an example, the subject or patient is a companion pet animal (eg, a bird, horse, dog, cat or rabbit). In an example, the subject or patient is an insect (an insect at any stage of its lifecycle, eg, egg, larva or pupa, eg, a fly or crawling insect or a beetle). In an example, the subject or patient is a cephalopod or nematode. In an example, the subject or patient is a plant or animal pest. In an example, the treatment of an animal or human may be a nutritional treatment, therapy of a disease or condition, prophylais of a disease or condition, ocular treatment, pesticide treatment, dental treatment, topical treatment or digestion treatment. In an example, the method enhances immunity of the subject or patient against a pathogen (eg a a pathogenic parasite, protozoan, virus or bacteria). In an example, the treatment or therapy is a combination treatment or therapy practised on the human or animal, wherein the human or animal is administered a first medicament in combination with a second medicament or radiation. The first and/or second medicament may be an antibody therapy or immune cell transplant (eg, CAR-T or TILs transplant) therapy (and the immune modulation aspect of the invention may be advantageous for modulating such therapies). In an example, each medicament or treatment is selected from Table 2.

In an example, the disease or condition is diabetes (eg, Type I or II diabetes, insulin-resistant diabetes (eg, insulin-resistant Type II diabetes), onset of insulin resistance in a diabetic or pre-diabetic patient or reduction in insulin responsiveness in a a diabetic or pre-diabetic patient. Optionally additionally in this example, the first or host cells that are targeted are Prevotella copri or Bacteroides vulgatus cells. In an embodiment, both Prevotella copri and Bacteroides vulgatus cells are targeted (ie, killed and/or population growth reduced, or reduced in the microbiota following administration of a transplant as described herein) in the patient, wherein said disease or condition is treated or prevented.

The invention also provides: the HM-CRISPR/Cas system, HM-array or HM-crRNA for administration to a patient for therapy of a disease or condition in the patient using the method of the invention.

The invention also provides: A kit comprising an ex vivo population of immune cells for adoptive cell therapy of a patient, wherein the kit further comprises the transplant, system, array or crRNA, optionally wherein the immune cells are selected from CAR-T cells, T-cells expressing engineered T-cell receptors (TCRs), tumour infiltrating lymphocytes (TILs) and NK cells.

Mobile Genetic Elements (MGEs)

In an example, each vector is a nucleic acid vector comprising or consisting of a mobile genetic element (MGE), wherein the MGE comprises an origin of transfer (oriT) and a CRISPR array for modifying a target sequence of the genome of a host cell or the genome of a virus (eg, prophage) in a host cell. Examples of MGEs are ICEs, transposons, plasmids and bacteriophage. An origin of transfer (oriT) is a short sequence (eg, up to 500 bp) that is necessary for transfer of the DNA that contains it from a bacterial host to recipient during conjugation. The oriT is cis-acting—it is found on the same DNA that is being transferred, and it is transferred along with the DNA. A typical origin of transfer comprises three functionally defined domains: a nicking domain, a transfer domain, and a termination domain.

Reference is made to the ICEberg database (db-mml.sjtu.edu.cn/ICEberg/), which provides examples of suitable ICEs for the invention and sources for suitable oriT. In an example, the ICE is a member of an ICE family comprising an ICE selected from the group 1 to 28, or the oriT is an oriT of a member of such a family: 1=SXT/R391; 2=Tn916; 3=Tn4371; 4=CTnDOT/ERL; 5=ICEclc; 6=ICEBsl; 7=ICEHin1056; 8=PAPI-1; 9=ICEM1Sym(R7A); 10=ICEStl; 11=SPI-7; 12=ICE6013; 13=ICEKpl; 14=TnGBS1; 15=Tn5253; 16=ICESa2603; 17=ICEYel; 18=10270-RD.2; 19=Tn1207.3; 20=Tn1806; 21=ICEA5632; 22=ICEF-I/II; 23=ICEAPG2; 24=ICEM; 25=10270-RD.1; 26=Tn5801; 27=PPI-1; 28=ICEF-III. Family descriptions are found in the ICEberg database. For example, the Tn916 family was defined by Roberts et al (2009) (Trends Microbiol. 2009 June; 17(6):251-8. doi: 10.1016/j.tim.2009.03.002. Epub 2009 May 20; “A modular master on the move: the Tn916 family of mobile genetic elements”, Roberts A, Mullany P). Elements belonging to the Tn916 family are defined by the following criteria: they must have the general organization shown in Roberts et al, and they must have a core region (conjugation and regulation module) that is similar in sequence and structure to the original Tn916 at the DNA level. Exceptions are some conjugative transposons, such as Tn1549 which have been previously classified in this family and those with a high degree of protein similarity as described in corresponding references. Optionally, the ICE is a transposon, eg, a conjugative transposon. In an example, the MGE is a mobilisable transposon that is mobilisable in the presence of a functional helper element, optionally wherein the transposon is in combination with a said helper element.

Optionally the vector is a plasmid, optionally wherein the MGE is a transposon comprised by the plasmid. For example, the transposon is a conjugative transposon. In an example the transposon is a mobilisable transposon (eg, mobilisable using one or more factors encoded by the plasmid, eg, by genes outside the transposon sequence of the plasmid). Optionally, the transposon is a Type I transposon. Optionally, the transposon is a Type II transposon. Optionally, the vector oriT is an oriT of a Bacteroidetes (eg, Bacteroidales or Bacteroides) or Prevotella transposon. This useful when the first (host) cells are Bacteroidetes (eg, Bacteroidales or Bacteroides) or Prevotella respectively. Optionally, the vector oriT is a CTnDot, CTnERL SXT/R391, Tn916 or Tn4371 family transposon oriT.

Optionally, the method comprises exposing the patient's microbiota to a vector or MGE (eg, one described above) that comprises a toxin-antioxin module that comprises an anti-toxin gene that is operable in the second bacteria, but is not operable or has reduced operation in first (host) cells. Thus, first cells are killed and second bacteria are spared, thereby altering the proportion of first cells in the patient's microbiota.

Split CRISPR/CAS System

In one aspect, endogenous Cas of the first (host) cells is harnessed and operates with the engineered sequences comprised by vectors (eg, phage) that are introduced into host cells. This aspect is advantageous to free up space in vectors, for example viruses or phage that have restricted capacity for carrying exogenous sequence. By freeing up space, one is able to include more targeting spacers or arrays, which is useful for evading host resistance. It is advantageous, for example to harness the endogenous Cas endonuclease rather than encode it in the vector—especially for bulky Cas sequences such as sp or saCas9. Additionally, there is not chance of inferior compatibility as may be seen with some exogenous Cas from non-host sources. The ability to reduce virus, eg, phage genome size, may also be beneficial for promoting host cell uptake (infection and/or maintenance of the virus in host cells). In some examples, an advantage is that invasion of the host by the vector (eg, phage) may upregulate host CRISPR/Cas activity, including increased expression of host Cas nucleases—in an attempt of the host to combat invading nucleic acid. This, however, is also useful to provide endogenous Cas for use with the invention when these use cRNA or gRNA that are recognised by the host Cas. In the case where the invention involves cRNA or gRNA targeting a host CRISPR array, this then promotes inactivation of the host CRISPR array itself, akin to a “suicidal” host cell which then uses its own Cas nuclease to inactivate its own CRISPR systems.

Thus, the vectors may lack a Cas nuclease (eg, aCas9)-encoding sequence.

Optionally, the endogenous first (host) cell system is a CRISPR/Cas9 system. Optionally, the nuclease is a Type I Cas nuclease. Optionally, the nuclease is a Type II Cas nuclease (eg, a Cas9). Optionally, the nuclease is a Type III Cas nuclease.

To save even more space, optionally a tracrRNA sequence is not provided by the vectors, but is a tracrRNA sequence of an endogenous host cell CRISPR/Cas system, wherein the tracrRNA is capable of hybridising with the HM-crRNA in the cell for subsequent processing into mature crRNA for guiding Cas to the target in the host cell.

Generally Applicable Features

The following features apply to any configuration (eg, in any of its aspects, embodiments, concepts, paragraphs or examples) of the invention:—

In an example, the target sequence is a chromosomal sequence, an endogenous host cell sequence, a wild-type host cell sequence, a non-viral chromosomal host cell sequence and/or a non-phage sequence (ie, one more or all of these), eg, the sequence is a wild-type host chromosomal cell sequence such as as antibiotic resistance gene or essential gene sequence comprised by a host cell chromosome. In an example, the sequence is a host cell plasmid sequence, eg, an antibiotic resistance gene sequence.

In an example, at least two target sequences are modified by Cas, for example an antibiotic resistance gene and an essential gene. Multiple targeting in this way may be useful to reduce evolution of escape mutant host cells.

In an example, the Cas is a wild-type endogenous host cell Cas nuclease. In an example, each host cell has constitutive Cas nuclease activity, eg, constitutive wild-type Cas nuclease activity. In an example, the host cell is a bacterial cell; in another example the host cell is an archael cell. Use of an endogenous Cas is advantageous as this enables space to be freed in vectors cRNA or gRNA. For example, Type II Cas9 nucleotide sequence is large and the use of endogenous Cas of the host cell instead is advantageous in that instance when a Type II CRISPR/Cas system is used for host cell modification in the present invention. The most commonly employed Cas9, measuring in at 4.2 kilobases (kb), comes from S pyogenes. While it is an efficient nuclease, the molecule's length pushes the limit of how much genetic material a vector can accommodate, creating a barrier to using CRISPR in the tissues of living animals and other settings described herein (see F. A. Ran et al., “In vivo genome editing using Staphylococcus aureus Cas9,” Nature, doi:10.1038/nature14299, 2015). Thus, in an embodiment, the vector of the invention is a AAV vector or has an exogenous DNA insertion capacity no more than an AAV vector, and the Cas is an endogenous Cas of the host cell, wherein the cell is a bacterial or archaeal cell. S thermophilus Cas9 (UniProtKB—G3ECR1 (CAS9_STRTR)) nucleotide sequence has a size of 1.4 kb.

In an example, the vector is a viral vector. Viral vectors have a particularly limited capacity for exogenous DNA insertion, thus virus packaging capacity needs to be considered. Room needs to be left for sequences encoding vital viral functions, such as for expressing coat proteins and polymerase. In an example, the vector is a phage vector or an AAV or lentiviral vector. Phage vectors are useful where the host is a bacterial cell.

By use of the term “engineered” it will be readily apparent to the skilled addressee that the array, sequence, vector, cRNA, gRNA, MGE or any other configuration, concept, aspect, embodiment, paragraph or example etc of the invention is non-naturally occurring. For example, the MGE, vector, sequence or array comprises one or more sequences or components not naturally found together with other sequences or components of the MGE, vector, sequence or array. For example, the array or sequence is recombinant, artificial, synthetic or exogenous (ie, non-endogenous or not wild-type) to the or each host cell.

In an example, the array or sequence of the invention is an engineered version of an array or sequence isolated, for example isolated from a host cell. In an example, the engineered array or sequence is not in combination with a Cas endonuclease-encoding sequence that is naturally found in a cell.

Studies suggest that Bacteroides have a role in preventing infection with Clostridium difficile. The development of the immune response that limits entry and proliferation of potential pathogens is profoundly dependent upon B fragilis. Also, Paneth cell proteins may produce antibacterial peptides in response to stimulation by B thetaiotomicron, and these molecules may prevent pathogens from colonizing the gut. In addition, B thetaiotomicron can induce Paneth cells to produce a bactericidal lectin, RegIII, which exerts its antimicrobial effect by binding to the peptidoglycan of gram-positive organisms. Thus, the use of the invention in any of its configurations for increasing the proportion of Bacteroides (eg, thetaiotomicron and/or fragalis) in the patient's microbiota is useful for limiting pathogenic bacterial colonisation of the population or a gut of a human or non-human animal.

Hooper et al demonstrated that B thetaiotomicron can modify intestinal fucosylation in a complex interaction mediated by a fucose repressor gene and a signaling system. Using transcriptional analysis it was demonstrated that B thetaiotaomicron can modulate expression of a variety of host genes, including those involved in nutrient absorption, mucosal barrier fortification, and production of angiogenic factors.

Optionally, the host (or first and/or second bacteria) is a gram negative bacterium (eg, a spirilla or vibrio). Optionally, the host (or first and/or second bacteria) is a gram positive bacterium. Optionally, the host (or first and/or second bacteria) is a mycoplasma, chlamydiae, spirochete or mycobacterium. Optionally, the host (or first and/or second bacteria) is a Streptococcus (eg, pyogenes or thermophilus) host. Optionally, the host (or first and/or second bacteria) is a Staphylococcus (eg, aureus, eg, MRSA) host. Optionally, the host (or first and/or second bacteria) is an E. coli (eg, 0157: H7) host, eg, wherein the Cas is encoded by the vecor or an endogenous host Cas nuclease activity is de-repressed. Optionally, the host (or first and/or second bacteria) is a Pseudomonas (eg, aeruginosa) host. Optionally, the host (or first and/or second bacteria) is a Vibro (eg, cholerae (eg, O139) or vulnificus) host. Optionally, the host (or first and/or second bacteria) is a Neisseria (eg, gonnorrhoeae or meningitidis) host. Optionally, the host (or first and/or second bacteria) is a Bordetella (eg, pertussis) host. Optionally, the host (or first and/or second bacteria) is a Haemophilus (eg, influenzae) host. Optionally, the host (or first and/or second bacteria) is a Shigella (eg, dysenteriae) host. Optionally, the host (or first and/or second bacteria) is a Brucella (eg, abortus) host. Optionally, the host (or first and/or second bacteria) is a Francisella host. Optionally, the host (or first and/or second bacteria) is a Xanthomonas host. Optionally, the host (or first and/or second bacteria) is a Agrobacterium host. Optionally, the host (or first and/or second bacteria) is a Erwinia host. Optionally, the host (or first and/or second bacteria) is a Legionella (eg, pneumophila) host. Optionally, the host (or first and/or second bacteria) is a Listeria (eg, monocytogenes) host. Optionally, the host (or first and/or second bacteria) is a Campylobacter (eg, jejuni) host. Optionally, the host (or first and/or second bacteria) is a Yersinia (eg, pestis) host. Optionally, the host (or first and/or second bacteria) is a Borelia (eg, burgdorferi) host. Optionally, the host (or first and/or second bacteria) is a Helicobacter (eg, pylori) host. Optionally, the host (or first and/or second bacteria) is a Clostridium (eg, dificile or botulinum) host. Optionally, the host (or first and/or second bacteria) is a Erlichia (eg, chaffeensis) host. Optionally, the host (or first and/or second bacteria) is a Salmonella (eg, typhi or enterica, eg, serotype typhimurium, eg, DT 104) host. Optionally, the host (or first and/or second bacteria) is a Chlamydia (eg, pneumoniae) host. Optionally, the host (or first and/or second bacteria) is a Parachlamydia host. Optionally, the host (or first and/or second bacteria) is a Corynebacterium (eg, amycolatum) host. Optionally, the host (or first and/or second bacteria) is a Klebsiella (eg, pneumoniae) host. Optionally, the host (or first and/or second bacteria) is a Enterococcus (eg, faecalis or faecim, eg, linezolid-resistant) host. Optionally, the host (or first and/or second bacteria) is a Acinetobacter (eg, baumannii, eg, multiple drug resistant) host.

A tracrRNA sequence may be omitted from a array or vector of the invention, for example for Cas systems of a Type that does not use tracrRNA.

In an example, the Cas guided to the target is an exonuclease. Optionally a nickase as mentioned herein is a double nickase. An example of a nickase is a Cas9 nickase, ie, a Cas9 that has one of the two nuclease domains inactivated—either the RuvC and/or HNH domain.

Mention herein of using vector DNA can also in an alternative embodiment apply mutatis mutandis to vector RNA where the context allows. For example, where the vector is an RNA vector. All features of the invention are therefore in the alternative disclosed and to be read as “RNA” instead of “DNA” when referring to vector DNA herein when the context allows. In an example, the or each vector also encodes a reverse transcriptase.

In an example, the or each array or engineered nucleotide sequence is provided by a nanoparticle vector or in liposomes.

In an example, the Cas is a Cas nuclease for cutting, dead Cas (dCas) for interrupting or a dCas conjugated to a transcription activator for activating the target.

In an example, the or each array or engineered sequence comprises an exogenous promoter functional for transcription of the crRNA or gRNA in the host.

In an embodiment the array or engineered sequence is contained in a virophage vector and the host is alternatively a virus which can infect a cell. For example, the host is a large virus that may have infected an amoeba cell. For example, the host is a Sputnik virus, Pithovirus, mimivirus, mamavirus, Megavirus or Pandoravirus, eg, wherein the host virus is in water. In an example of this embodiment, the invention is for water or sewage treatment (eg, purification, eg, waterway, river, lake, pond or sea treatment).

In an embodiment the or each vector or engineered sequence is or is comprised by a ΦNM1 phage, eg, wherein the host cell(s) is a S. aureus (eg, MRSA) cell.

For example the method is practised on a mammalian subject, eg, a human, rodent, mouse or rat. For example the method is practised on a vertebrate, reptile, bird or fish.

The cell population can be administered to the patient in one or more doses. For example, the method comprises administering an antibacterial agent to cause said dysbiosis, or administering a bacterial transplant to the patient to cause said dysbiosis.

Wherein the method reduces the cell therapy, the therapy can be downregulated, dampened or switched off, eg, to reduce or prevent an unwanted side-effect of the cell therapy (eg, a CAR-T therapy side effect in a human patient, such as CRS). Wherein the method increases the cell therapy, the therapy can be upregulated, enhance or switched on, eg, to enhance cytotoxicity against one target cells.

The method treats or prevents (ie, reduces the risk of) the disease or condition. This may be complete or partial treatment or prevention, ie, a reduction but not complete reduction of the disease/condition or symptoms thereof; or a reducing of the risk but not total prevention of the disease/condition or a symptom thereof. Similarly, the method treats or prevents (ie, reduces the risk of) an undesirable symptom of the disease or condition or the therapy (eg, CRS).

Concepts:

-   1. A method of modulating an adoptive immune cell therapy of a     disease or condition in a patient, the method comprising     -   a. Carrying out adoptive immune cell therapy in the patient,         comprising administering a population of immune cells to the         patient, wherein administration of said immune cells is capable         of treating the disease or condition in the patient; and     -   b. Causing bacterial microbiota (eg, gut microbiota) dysbiosis         in the patient, whereby said dysbiosis modulates the immune cell         therapy in the patient. -   2. A method of modulating an adoptive immune cell therapy of a     disease or condition in a patient, the method comprising     -   a. Carrying out adoptive immune cell therapy in the patient,         comprising administering a population of immune cells to the         patient, wherein administration of said immune cells is capable         of treating the disease or condition in the patient; and     -   b. Altering the relative proportion of a sub-population of cells         of a first bacterial species or strain, or archaeal species or         strain, in a microbiota (eg, gut microbiota) of the patient,         thereby producing an altered microbiota that modulates the         immune cell therapy in the patient. -   3. The method of concept 2, wherein step (b) is carried out by     targeting the sub-population of first cells by administering thereto     an anti-bacterial or anti-archaeal agent simultaneously or     sequentially with said immune cell population, whereby first cells     are killed or the sub-population growth is reduced, thereby reducing     the proportion of said sub-population in the microbiota of the     patient. -   4. The method of any preceding concept, wherein the cell therapy is     an adoptive T-cell therapy. -   5. The method of concept 4, wherein cells selected from the group     consisting of CD4⁺ T-cells, CD8⁺ T-cells, T_(H)1 cells and T_(H)17     cells are administered to the patient in step (a). -   6. The method of concept 4 or 5, wherein T_(H)17 cells are modulated     in the patient. -   7. The method of concept 4, 5 or 6, wherein T_(reg) cells are     modulated in the patient. -   8. The method of any preceding concept, wherein the cell therapy is     enhanced. -   9. The method of any preceding concept wherein T_(H)17 cells are     upregulated in the patient and/or T_(reg) cells are downregulated in     the patient. -   10. The method of any preceding concept, wherein CD4⁺ T-cells are     upregulated in the patient. -   11. The method of any preceding concept, wherein CD8⁺ T-cells are     upregulated in the patient. -   12. The method of any preceding concept, wherein one or more of     central memory T cells (T_(CM)), effector memory T cells (T_(EM)),     stem cell memory cells (T_(SCM)) and effector cells (T_(eff)) are     upregulated in the patient, wherein the cells are comprised by the     immune cell population administered in step (a) and/or are progeny     thereof. -   13. The method of any one of concepts 1 to 7, wherein the cell     therapy is reduced. -   14. The method of concept 13, wherein the method reduces or prevents     the risk of cytokine release syndrome (CRS) in the patient. -   15. The method of any one of concepts 1 to 7, 13 and 14, wherein,     T_(H)17 cells are downregulated in the patient and/or T_(reg) cells     are upregulated in the patient. -   16. The method of any one of concepts 1 to 7 and 13 to 15, wherein     CD4⁺ T-cells are downregulated in the patient. -   17. The method of any one of concepts 1 to 7 and 13 to 16, wherein     CD8⁺ T-cells are downregulated in the patient. -   18. The method of any one of concepts 1 to 7 and 13 to 17, wherein     one or more of central memory T cells (T_(CM)), effector memory T     cells (T_(EM)), stem cell memory cells (T_(SCM)) and effector cells     (T_(eff)) are downregulated in the patient, wherein the cells are     comprised by the immune cell population administered in step (a)     and/or are progeny thereof. -   19. The method of any preceding concept, wherein the immune cell     population comprises CAR-T cells and/or T-cells expressing     engineered T-cell receptors (TCRs) and/or tumour infiltrating     lymphocytes (TILs). -   20. The method of any preceding concept, wherein the immune cell     population comprises engineered autologous or allogeneic immune     cells, eg, T-cells, NK cells and/or TILs. -   21. The method of concept 19 or 20, wherein the T-cells are CD4⁺     T-cells or T_(H)17 cells. -   22. The method of any preceding concept, wherein step (b) increases     the proportion of Bacteroides (eg, B fragalis and/or B     thetaiotamicron) in the microbiota. -   23. The method of any one of concepts 1 to 21, wherein step (b)     decreases the proportion of Bacteroides (eg, B fragalis and/or B     thetaiotamicron) in the microbiota. -   24. The method of any preceding concept, wherein step (b) increases     the proportion of Bacteroidetes to Firmicutes in the microbiota. -   25. The method of any one of concepts 1 to 23, wherein step (b)     decreases the proportion of Bacteroidetes to Firmicutes in the     microbiota. -   26. The method of any preceding concept, wherein step (b) reduces     the proportion of one or more Clostridium species or strain (eg,     wherein each species is a cluster IV or XIVa Clostridium species) in     the microbiota. -   27. The method of any one of concepts 1 to 25, wherein step (b)     increases the proportion of one or more Clostridium species or     strain (eg, wherein each species is a cluster IV or XIVa Clostridium     species) in the microbiota. -   28. The method of any preceding concept, wherein step (b) reduces     the proportion of Bifidobacterium (eg, B bifidum) in the microbiota. -   29. The method of any one of concepts 1 to 27, wherein step (b)     increases the proportion of Bifidobacterium (eg, B bifidum) in the     microbiota. -   30. The method of any preceding concept, wherein step (b) comprises     altering the relative proportion of a or said sub-population of     first cells in the microbiota of the patient, thereby producing an     altered microbiota that modulates the immune cell therapy in the     patient, wherein the sub-population comprises host cells of said     first species or strain, the method comprising     -   a. combining the microbiota with multiple copies of engineered         nucleic acid sequences encoding host modifying (HM) crRNAs, and     -   b. expressing HM-crRNAs in host cells,     -   wherein each engineered nucleic acid sequence is operable with a         Cas nuclease in a respective host cell to form a HM-CRISPR/Cas         system and the engineered sequence comprises     -   (iii) spacer and repeat sequences encoding a HM-crRNA;     -   (iv) the HM-crRNA comprising a sequence that is capable of         hybridizing to a host cell target sequence to guide Cas nuclease         to the target sequence in the host cell; and     -   optionally the HM-system comprises a tracrRNA sequence or a DNA         sequence expressing a tracrRNA sequence;     -   whereby HM-crRNAs guide Cas modification of host target         sequences in host cells, whereby host cells are killed or the         host cell population growth is reduced, thereby reducing the         proportion of said sub-population in the microbiota. -   31. The method of concept 30, comprising using endogenous Cas     nuclease of host cells for modification of target nucleotide     sequences. -   32. The method of concept 30 or 31, comprising reducing host cell     population growth by at least 5-fold compared to the growth of a     control population of host cells that have not received said Cas     modification. -   33. The method of any one of concepts 30 to 32, comprising     inhibiting host cell population growth on a gut surface. -   34. The method of any one of concepts 30 to 33, wherein the     microbiota comprises cells of a second bacterial species or strain,     or archaeal species or strain, wherein the second species or strain     has a 16s ribosomal RNA-encoding DNA sequence that is at least 80%     identical to an 16s ribosomal RNA-encoding DNA sequence of the host     cell species or strain, wherein the growth of the second cells in     the microbiota is not inhibited by said HM-system. -   35. The method of concept 34, wherein the second species or strain     is a human gut commensal species or strain and/or a human gut     probiotic species or strain. -   36. The method of concept 34 or 35, wherein the second species or     strain is a Bacteroidetes (eg, Bacteroides) and optionally the host     cells are gram positive bacterial cells. -   37. The method of any one of concepts 30 to 36, wherein the first     cells are Firmicutes cells. -   38. The method of any one of concepts 30 to 37, wherein for each     host cell the system comprises components according to (i) to (iv):—     -   (i) at least one nucleic acid sequence encoding a Cas nuclease;     -   (ii) an engineered HM-CRISPR array comprising a spacer sequence         and repeats encoding a HM-crRNA, the HM-crRNA comprising a         sequence that hybridises to a host cell target sequence to guide         said Cas to the target in the host cell to modify the target         sequence;     -   (iii) an optional tracrRNA sequence or a DNA sequence expressing         a tracrRNA sequence;     -   (iv) wherein said components of the system are split between the         host cell and at least one nucleic acid vector that transforms         the host cell, whereby the HM-crRNA guides Cas to the target to         modify the host target sequence in the host cell; and     -   wherein the target sequence is modified by the Cas whereby the         host cell is killed or host cell growth is reduced;     -   the method comprising introducing the vectors of (iv) into host         cells and expressing said HM-crRNA in the host cells, allowing         HM-cRNA to hybridise to host cell target sequences to guide Cas         to the targets in the host cells to modify target sequences,         whereby host cells are killed or host cell growth is reduced,         thereby altering the proportion of said sub-population in the         microbiota. -   39. The method of concept 38, wherein component (i) is endogenous to     each host cell. -   40. The method of concept 38 or 39, wherein each vector is a virus     or phage. -   41. The method of any one of concepts 30 to 40, wherein each target     sequence is adjacent a NNAGAAW or NGGNG protospacer adjacent motif     (PAM). -   42. The method of any one of concepts 30 to 41, wherein     alternatively HM-crRNA and tracrRNA are comprised by a single guide     RNA (gRNA), the method comprising introducing said gRNA into host     cells or expressing the gRNA in host cells. -   43. The method of any one of concepts 30 to 35 and 37 to 42, wherein     the microbiota comprises a second bacterial or archaeal species,     wherein each of the first and second species is a respective species     of the same phylum (eg, both Firmicutes species) and the growth of     the second bacteria is not inhibited by the HM-system; or wherein     the microbiota comprises a second bacterial or archaeal strain,     wherein each of the first and second bacteria or archaea is a     respective strain of the same species and the growth of the second     bacteria or archaea is not inhibited by the HM-system. -   44. The method of any one of concepts 30 to 43, wherein the     microbiota comprises a second bacterial species, wherein each of the     first and second species is a respective gram-positive species and     the growth of the second bacteria is not inhibited by the HM-system. -   45. The method of any one of concepts 30 to 44, wherein each target     sequence is comprised by an antibiotic resistance gene, virulence     gene or essential gene of the host cell. -   46. The method of any preceding concept, wherein each first cell is     a Staphylococcus, Streptococcus, Pseudomonas, Salmonella, Listeria,     E coli, Desulfovibrio, Vibrio or Clostridium cell. -   47. The method of any preceding concept, wherein step (b) comprises     stimulating Paneth cells of the patient by gut Bacteroides (eg, B     thetaiotamicron), wherein the altered microbiota produced by     step (b) comprises an increased proportion of Bacteroides first     bacteria compared with the microbiota before step (b), whereby     Paneth cells are stimulated and the cell therapy is modulated. -   48. The method of any preceding concept, wherein step (b) comprises     developing an immune response in the patient to gut Bacteroides (eg,     B thetaiotamicron), wherein the altered microbiota produced by     step (b) comprises an increased proportion of Bacteroides first     bacteria compared with the microbiota before step (b), whereby the     cell therapy is modulated. -   49. The method of any preceding concept, wherein step (b) comprises     altering the relative proportion of a or said sub-population of     first cells in the microbiota of the patient, thereby producing an     altered microbiota that modulates the immune cell therapy in the     patient, wherein step (b) comprises killing first cells of said     sub-population or inhibiting growth of said sub-population by using     guided nuclease targeting to the genome of first cells comprised by     the sub-population. -   50. A bacterial or archaeal transplant for administration to a     patient for therapy of a disease or condition in the patient using     the method of any preceding concept, optionally wherein the     transplant comprises cells of said first species. -   51. A HM-CRISPR/Cas system, HM-array or HM-crRNA as recited in any     one of concepts 30 to 45 for administration to a patient for therapy     of a disease or condition in the patient using the method of any one     of concepts 1 to 49. -   52. A kit comprising an ex vivo population of immune cells for     adoptive cell therapy of a patient, wherein the kit further     comprises a transplant, system, array or crRNA of concept 50 or 51,     optionally wherein the immune cells are selected from CAR-T cells,     T-cells expressing engineered T-cell receptors (TCRs), tumour     infiltrating lymphocytes (TILs) and NK cells.

Aspects:

-   1. An ex vivo population of immune cells for use in a method of     adoptive cell therapy of a patient for treating or preventing a     disease or condition in the patient, the method comprising     -   a. Carrying out adoptive immune cell therapy in the patient,         comprising administering cells of said population to the         patient, wherein administration of said immune cells is capable         of treating the disease or condition in the patient; and     -   b. Causing gut bacterial microbiota dysbiosis in the patient,         whereby said dysbiosis modulates the immune cell therapy in the         patient and said disease or condition is treated or prevented. -   2. An ex vivo population of immune cells for use in a method of     adoptive cell therapy of a patient for treating or preventing a     disease or condition in the patient, the method comprising     -   a. Carrying out adoptive immune cell therapy in the patient,         comprising administering cells of said population to the         patient, wherein administration of said immune cells is capable         of treating the disease or condition in the patient; and     -   b. Altering the relative proportion of a sub-population of cells         of a first bacterial species or strain, or archaeal species or         strain, in the gut microbiota of the patient, thereby producing         an altered gut microbiota that modulates the immune cell therapy         in the patient. -   3. The immune cell population of Aspect 2, wherein step (b) is     carried out by targeting the sub-population of first cells by     administering thereto an anti-bacterial or anti-archaeal agent (eg,     a guided nuclease) simultaneously or sequentially with said immune     cell population, whereby first cells are killed or the     sub-population growth is reduced, thereby reducing the proportion of     said sub-population in the gut microbiota of the patient. -   4. The immune cell population of any preceding Aspect, wherein the     cell therapy is an adoptive T-cell therapy. -   5. The immune cell population of Aspect 4, wherein cells selected     from the group consisting of CD4⁺ T-cells, CD8⁺ T-cells, T_(H)1     cells and T_(H)-17 cells are administered to the patient in step     (a). -   6. The immune cell population of Aspect 4 or 5, wherein T_(H)17     cells are modulated in the patient. -   7. The immune cell population of Aspect 4, 5 or 6, wherein T_(reg)     cells are modulated in the patient. -   8. The immune cell population of any preceding Aspect, wherein the     cell therapy is enhanced. -   9. The immune cell population of any preceding Aspect wherein     T_(H)17 cells are upregulated in the patient and/or T_(reg) cells     are downregulated in the patient. -   10. The immune cell population of any preceding Aspect, wherein CD4⁺     T-cells are upregulated in the patient. -   11. The immune cell population of any preceding Aspect, wherein CD8⁺     T-cells are upregulated in the patient. -   12. The immune cell population of any preceding Aspect, wherein one     or more of central memory T cells (T_(CM)), effector memory T cells     (T_(EM)), stem cell memory cells (T_(SCM)) and effector cells     (T_(eff)) are upregulated in the patient, wherein the cells are     comprised by the immune cell population administered in step (a)     and/or are progeny thereof. -   13. The immune cell population of any one of Aspects 1 to 7, wherein     the cell therapy is reduced. -   14. The immune cell population of Aspect 13, wherein the method     reduces or prevents the risk of cytokine release syndrome (CRS) in     the patient. -   15. The immune cell population of any one of Aspects 1 to 7, 13 and     14, wherein, T_(H)17 cells are downregulated in the patient and/or     T_(reg) cells are upregulated in the patient. -   16. The immune cell population of any one of Aspects 1 to 7 and 13     to 15, wherein CD4⁺ T-cells are downregulated in the patient. -   17. The immune cell population of any one of Aspects 1 to 7 and 13     to 16, wherein CD8⁺ T-cells are downregulated in the patient. -   18. The immune cell population of any one of Aspects 1 to 7 and 13     to 17, wherein one or more of central memory T cells (T_(CM)),     effector memory T cells (T_(EM)), stem cell memory cells (T_(SCM))     and effector cells (T_(eff)) are downregulated in the patient,     wherein the cells are comprised by the immune cell population     administered in step (a) and/or are progeny thereof. -   19. The immune cell population of any preceding Aspect, wherein the     immune cell population comprises or consists of CAR-T cells and/or     T-cells expressing engineered T-cell receptors (TCRs) and/or tumour     infiltrating lymphocytes (TILs). -   20. The immune cell population of any preceding Aspect, wherein the     immune cell population comprises or consists of engineered     autologous or allogeneic immune cells, eg, T-cells, NK cells and/or     TILs. -   21. The immune cell population of Aspect 19 or 20, wherein the     T-cells are CD4⁺ T-cells or T_(H)17 cells. -   22. The immune cell population of any preceding Aspect, wherein     step (b) increases the proportion of Bacteroides (eg, B fragalis     and/or B thetaiotamicron) in the gut microbiota. -   23. The immune cell population of any one of Aspects 1 to 21,     wherein step (b) decreases the proportion of Bacteroides (eg, B     fragalis and/or B thetaiotamicron) in the gut microbiota. -   24. The immune cell population of any preceding Aspect, wherein     step (b) increases the proportion of Bacteroidetes to Firmicutes in     the gut microbiota. -   25. The immune cell population of any one of Aspects 1 to 23,     wherein step (b) decreases the proportion of Bacteroidetes to     Firmicutes in the gut microbiota. -   26. The immune cell population of any preceding Aspect, wherein     step (b) reduces the proportion of one or more Clostridium species     or strain (eg, wherein each species is a cluster IV or XIVa     Clostridium species) in the gut microbiota. -   27. The immune cell population of any one of Aspects 1 to 25,     wherein step (b) increases the proportion of one or more Clostridium     species or strain (eg, wherein each species is a cluster IV or XIVa     Clostridium species) in the gut microbiota. -   28. The immune cell population of any preceding Aspect, wherein     step (b) reduces the proportion of Bifidobacterium (eg, B bifidum)     in the gut microbiota. -   29. The immune cell population of any one of Aspects 1 to 27,     wherein step (b) increases the proportion of Bifidobacterium (eg, B     bifidum) in the gut microbiota. -   30. The immune cell population of any preceding Aspect, wherein     step (b) comprises altering the relative proportion of a or said     sub-population of first cells in the gut microbiota of the patient,     thereby producing an altered gut microbiota that modulates the     immune cell therapy in the patient, wherein the sub-population     comprises host cells of said first species or strain, the method     comprising     -   a. combining the microbiota with multiple copies of engineered         nucleic acid sequences encoding host modifying (HM) crRNAs, and     -   b. expressing HM-crRNAs in host cells,     -   wherein each engineered nucleic acid sequence is operable with a         Cas nuclease in a respective host cell to form a HM-CRISPR/Cas         system and the engineered sequence comprises     -   (i) spacer and repeat sequences encoding a HM-crRNA;     -   (ii) the HM-crRNA comprising a sequence that is capable of         hybridizing to a host cell target sequence to guide Cas nuclease         to the target sequence in the host cell; and     -   optionally the HM-system comprises a tracrRNA sequence or a DNA         sequence expressing a tracrRNA sequence;     -   whereby HM-crRNAs guide Cas modification of host target         sequences in host cells, whereby host cells are killed or the         host cell population growth is reduced, thereby reducing the         proportion of said sub-population in the microbiota. -   31. The immune cell population of Aspect 30, comprising using     endogenous Cas nuclease of host cells for modification of target     nucleotide sequences. -   32. The immune cell population of Aspect 30 or 31, comprising     reducing host cell population growth by at least 5-fold compared to     the growth of a control population of host cells that have not     received said Cas modification. -   33. The immune cell population of any one of Aspects 30 to 32,     comprising inhibiting host cell population growth on a gut surface. -   34. The immune cell population of any one of Aspects 30 to 33,     wherein the microbiota comprises cells of a second bacterial species     or strain, or archaeal species or strain, wherein the second species     or strain has a 16s ribosomal RNA-encoding DNA sequence that is at     least 80% identical to an 16s ribosomal RNA-encoding DNA sequence of     the host cell species or strain, wherein the growth of the second     cells in the microbiota is not inhibited by said HM-system. -   35. The immune cell population of Aspect 34, wherein the second     species or strain is a human gut commensal species or strain and/or     a human gut probiotic species or strain. -   36. The immune cell population of Aspect 34 or 35, wherein the     second species or strain is a Bacteroidetes (eg, Bacteroides) and     optionally the host cells are gram positive bacterial cells. -   37. The immune cell population of any one of Aspects 30 to 36,     wherein the first cells are Firmicutes cells. -   38. The immune cell population of any one of Aspects 30 to 37,     wherein for each host cell the system comprises components according     to (i) to (iv):—     -   (i) at least one nucleic acid sequence encoding a Cas nuclease;     -   (ii) an engineered HM-CRISPR array comprising a spacer sequence         and repeats encoding a HM-crRNA, the HM-crRNA comprising a         sequence that hybridises to a host cell target sequence to guide         said Cas to the target in the host cell to modify the target         sequence;     -   (iii) an optional tracrRNA sequence or a DNA sequence expressing         a tracrRNA sequence;     -   (iv) wherein said components of the system are split between the         host cell and at least one nucleic acid vector that transforms         the host cell, whereby the HM-crRNA guides Cas to the target to         modify the host target sequence in the host cell; and     -   wherein the target sequence is modified by the Cas whereby the         host cell is killed or host cell growth is reduced;     -   the method comprising introducing the vectors of (iv) into host         cells and expressing said HM-crRNA in the host cells, allowing         HM-cRNA to hybridise to host cell target sequences to guide Cas         to the targets in the host cells to modify target sequences,         whereby host cells are killed or host cell growth is reduced,         thereby altering the proportion of said sub-population in the         microbiota. -   39. The immune cell population of Aspect 38, wherein component (i)     is endogenous to each host cell. -   40. The immune cell population of Aspect 38 or 39, wherein each     vector is a virus or phage. -   41. The immune cell population of any one of Aspects 30 to 40,     wherein each target sequence is adjacent a NNAGAAW or NGGNG     protospacer adjacent motif (PAM). -   42. The immune cell population of any one of Aspects 30 to 41,     wherein alternatively HM-crRNA and tracrRNA are comprised by a     single guide RNA (gRNA), the method comprising introducing said gRNA     into host cells or expressing the gRNA in host cells. -   43. The immune cell population of any one of Aspects 30 to 35 and 37     to 42, wherein the microbiota comprises a second bacterial or     archaeal species, wherein each of the first and second species is a     respective species of the same phylum (eg, both Firmicutes species)     and the growth of the second bacteria is not inhibited by the     HM-system; or wherein the microbiota comprises a second bacterial or     archaeal strain, wherein each of the first and second bacteria or     archaea is a respective strain of the same species and the growth of     the second bacteria or archaea is not inhibited by the HM-system. -   44. The immune cell population of any one of Aspects 30 to 43,     wherein the microbiota comprises a second bacterial species, wherein     each of the first and second species is a respective gram-positive     species and the growth of the second bacteria is not inhibited by     the HM-system. -   45. The immune cell population of any one of Aspects 30 to 44,     wherein each target sequence is comprised by an antibiotic     resistance gene, virulence gene or essential gene of the host cell. -   46. The method of any preceding Aspect, wherein each first cell is a     Staphylococcus, Streptococcus, Pseudomonas, Salmonella, Listeria, E     coli, Desulfovibrio, Vibrio or Clostridium cell. -   47. The immune cell population of any preceding Aspect, wherein     step (b) comprises stimulating Paneth cells of the patient by gut     Bacteroides (eg, B thetaiotamicron), wherein the altered microbiota     produced by step (b) comprises an increased proportion of     Bacteroides first bacteria compared with the microbiota before step     (b), whereby Paneth cells are stimulated and the cell therapy is     modulated. -   48. The immune cell population of any preceding Aspect, wherein     step (b) comprises developing an immune response in the patient to     gut Bacteroides (eg, B thetaiotamicron), wherein the altered     microbiota produced by step (b) comprises an increased proportion of     Bacteroides first bacteria compared with the microbiota before step     (b), whereby the cell therapy is modulated. -   49. The immune cell population of any preceding Aspect, wherein     step (b) comprises altering the relative proportion of a or said     sub-population of first cells in the gut microbiota of the patient,     thereby producing an altered gut microbiota that modulates the     immune cell therapy in the patient, wherein step (b) comprises     killing first cells of said sub-population or inhibiting growth of     said sub-population by using guided nuclease targeting to the genome     of first cells comprised by the sub-population. -   50. A bacterial or archaeal transplant for administration to a     patient for therapy of a disease or condition in the patient using     the method recited in any preceding Aspect, optionally wherein the     transplant comprises cells of said first species. -   51. A HM-CRISPR/Cas system, HM-array or HM-crRNA as recited in any     one of Aspects 30 to 45 for administration to a patient for therapy     of a disease or condition in the patient using the method recited in     any one of Aspects 1 to 49. -   52. A kit comprising an ex vivo population of immune cells according     to any one of Aspects 1 to 49 for adoptive cell therapy of a patient     to treat said disease or condition, wherein the kit further     comprises a transplant, system, array or crRNA of Aspect 50 or 51,     optionally wherein the immune cells are selected from CAR-T cells,     T-cells expressing engineered T-cell receptors (TCRs), tumour     infiltrating lymphocytes (TILs) and NK cells.

Optionally, the host cell(s), first cell(s), second cell(s) or mixed bacterial population is comprised by a human or a non-human animal subject, eg, the population is comprised by a gut microbiota, skin microbiota, oral cavity microbiota, throat microbiota, hair microbiota, armpit microbiota, vaginal microbiota, rectal microbiota, anal microbiota, ocular microbiota, nasal microbiota, tongue microbiota, lung microbiota, liver microbiota, kidney microbiota, genital microbiota, penile microbiota, scrotal microbiota, mammary gland microbiota, ear microbiota, urethra microbiota, labial microbiota, organ microbiota or dental microbiota. Optionally, the mixed bacterial population is comprised by a plant (eg, a tobacco, crop plant, fruit plant, vegetable plant or tobacco, eg on the surface of a plant or contained in a plant) or by an environment (eg, soil or water or a waterway or acqueous liquid).

Optionally, the disease or condition of a human or animal subject or patient is selected from

-   -   (a) A neurodegenerative disease or condition;     -   (b) A brain disease or condition;     -   (c) A CNS disease or condition;     -   (d) Memory loss or impairment;     -   (e) A heart or cardiovascular disease or condition, eg, heart         attack, stroke or atrial fibrillation;     -   (f) A liver disease or condition;     -   (g) A kidney disease or condition, eg, chronic kidney disease         (CKD);     -   (h) A pancreas disease or condition;     -   (i) A lung disease or condition, eg, cystic fibrosis or COPD;     -   (j) A gastrointestinal disease or condition;     -   (k) A throat or oral cavity disease or condition;     -   (l) An ocular disease or condition;     -   (m) A genital disease or condition, eg, a vaginal, labial,         penile or scrotal disease or condition;     -   (n) A sexually-transmissible disease or condition, eg,         gonorrhea, HIV infection, syphilis or Chlamydia infection;     -   (o) An ear disease or condition;     -   (p) A skin disease or condition;     -   (q) A heart disease or condition;     -   (r) A nasal disease or condition     -   (s) A haematological disease or condition, eg, anaemia, eg,         anaemia of chronic disease or cancer;     -   (t) A viral infection;     -   (u) A pathogenic bacterial infection;     -   (v) A cancer;     -   (w) An autoimmune disease or condition, eg, SLE;     -   (x) An inflammatory disease or condition, eg, rheumatoid         arthritis, psoriasis, eczema, asthma, ulcerative colitis,         colitis, Crohn's disease or IBD;     -   (y) Autism;     -   (z) ADHD;     -   (aa) Bipolar disorder;     -   (bb) ALS [Amyotrophic Lateral Sclerosis];     -   (cc) Osteoarthritis;     -   (dd) A congenital or development defect or condition;     -   (ee) Miscarriage;     -   (ff) A blood clotting condition;     -   (gg) Bronchitis;     -   (hh) Dry or wet AMD;     -   (ii) Neovascularisation (eg, of a tumour or in the eye);     -   (jj) Common cold;     -   (kk) Epilepsy;     -   (ll) Fibrosis, eg, liver or lung fibrosis;     -   (mm) A fungal disease or condition, eg, thrush;     -   (nn) A metabolic disease or condition, eg, obesity, anorexia,         diabetes, Type I or Type II diabetes.     -   (oo) Ulcer(s), eg, gastric ulceration or skin ulceration;     -   (pp) Dry skin;     -   (qq) Sjogren's syndrome;     -   (rr) Cytokine storm;     -   (ss) Deafness, hearing loss or impairment;     -   (tt) Slow or fast metabolism (ie, slower or faster than average         for the weight, sex and age of the subject);     -   (uu) Conception disorder, eg, infertility or low fertility;     -   (vv) Jaundice;     -   (ww) Skin rash;     -   (xx) Kawasaki Disease;     -   (yy) Lyme Disease;     -   (zz) An allergy, eg, a nut, grass, pollen, dust mite, cat or dog         fur or dander allergy;     -   (aaa) Malaria, typhoid fever, tuberculosis or cholera;     -   (bbb) Depression;     -   (ccc) Mental retardation;     -   (ddd) Microcephaly;     -   (eee) Malnutrition;     -   (fff) Conjunctivitis;     -   (ggg) Pneumonia;     -   (hhh) Pulmonary embolism;     -   (iii) Pulmonary hypertension;     -   (jjj) A bone disorder;     -   (kkk) Sepsis or septic shock;     -   (lll) Sinusitus;     -   (mmm) Stress (eg, occupational stress);     -   (nnn) Thalassaemia, anaemia, von Willebrand Disease, or         haemophilia;     -   (ooo) Shingles or cold sore;     -   (ppp) Menstruation;     -   (qqq) Low sperm count.

Neurodegenerative or CNS Diseases or Conditions for Treatment or Prevention by the Method

In an example, the neurodegenerative or CNS disease or condition is selected from the group consisting of Alzheimer disease, geriopsychosis, Down syndrome, Parkinson's disease, Creutzfeldt-jakob disease, diabetic neuropathy, Parkinson syndrome, Huntington's disease, Machado-Joseph disease, amyotrophic lateral sclerosis, diabetic neuropathy, and Creutzfeldt Creutzfeldt-Jakob disease. For example, the disease is Alzheimer disease. For example, the disease is Parkinson syndrome.

In an example, wherein the method of the invention is practised on a human or animal subject for treating a CNS or neurodegenerative disease or condition, the method causes downregulation of Treg cells in the subject, thereby promoting entry of systemic monocyte-derived macrophages and/or Treg cells across the choroid plexus into the brain of the subject, whereby the disease or condition (eg, Alzheimer's disease) is treated, prevented or progression thereof is reduced. In an embodiment the method causes an increase of IFN-gamma in the CNS system (eg, in the brain and/or CSF) of the subject. In an example, the method restores nerve fibre and/or reduces the progression of nerve fibre damage. In an example, the method restores nerve myelin and/or reduces the progression of nerve myelin damage. In an example, the method of the invention treats or prevents a disease or condition disclosed in WO2015136541 and/or the method can be used with any method disclosed in WO2015136541 (the disclosure of this document is incorporated by reference herein in its entirety, eg, for providing disclosure of such methods, diseases, conditions and potential therapeutic agents that can be administered to the subject for effecting treatment and/or prevention of CNS and neurodegenerative diseases and conditions, eg, agents such as immune checkpoint inhibitors, eg, anti-PD-1, anti-PD-L1, anti-TIM3 or other antibodies disclosed therein).

Cancers for Treatment or Prevention by the Method

Cancers that may be treated include tumours that are not vascularized, or not substantially vascularized, as well as vascularized tumours. The cancers may comprise non-solid tumours (such as haematological tumours, for example, leukaemias and lymphomas) or may comprise solid tumours. Types of cancers to be treated with the invention include, but are not limited to, carcinoma, blastoma, and sarcoma, and certain leukaemia or lymphoid malignancies, benign and malignant tumours, and malignancies e.g., sarcomas, carcinomas, and melanomas. Adult tumours/cancers and paediatric tumours/cancers are also included.

Haematologic cancers are cancers of the blood or bone marrow. Examples of haematological (or haematogenous) cancers include leukaemias, including acute leukaemias (such as acute lymphocytic leukaemia, acute myelocytic leukaemia, acute myelogenous leukaemia and myeloblasts, promyeiocytic, myelomonocytic, monocytic and erythroleukaemia), chronic leukaemias (such as chronic myelocytic (granulocytic) leukaemia, chronic myelogenous leukaemia, and chronic lymphocytic leukaemia), polycythemia vera, lymphoma, Hodgkin's disease, non-Hodgkin's lymphoma (indolent and high grade forms), multiple myeloma, Waldenstrom's macroglobulinemia, heavy chain disease, myeiodysplastic syndrome, hairy cell leukaemia and myelodysplasia.

Solid tumours are abnormal masses of tissue that usually do not contain cysts or liquid areas. Solid tumours can be benign or malignant. Different types of solid tumours are named for the type of cells that form them (such as sarcomas, carcinomas, and lymphomas). Examples of solid tumours, such as sarcomas and carcinomas, include fibrosarcoma, myxosarcoma, liposarcoma, chondrosarcoma, osteosarcoma, and other sarcomas, synovioma, mesothelioma, Ewing's tumour, leiomyosarcoma, rhabdomyosarcoma, colon carcinoma, lymphoid malignancy, pancreatic cancer, breast cancer, lung cancers, ovarian cancer, prostate cancer, hepatocellular carcinoma, squamous eel! carcinoma, basal cell carcinoma, adenocarcinoma, sweat gland carcinoma, medullary thyroid carcinoma, papillary thyroid carcinoma, pheochromocytomas sebaceous gland carcinoma, papillary carcinoma, papillary adenocarcinomas, medullary carcinoma, bronchogenic carcinoma, renal cell carcinoma, hepatoma, bile duct carcinoma, choriocarcinoma, Wilms' tumour, cervical cancer, testicular tumour, seminoma, bladder carcinoma, melanoma, and CNS tumours (such as a glioma (such as brainstem glioma and mixed gliomas), glioblastoma (also known as glioblastoma multiforme) astrocytoma, CNS lymphoma, germinoma, medulloblastoma, Schwannoma craniopharyogioma, ependymoma, pineaioma, hemangioblastoma, acoustic neuroma, oligodendroglioma, menangioma, neuroblastoma, retinoblastoma and brain metastases).

Autoimmune Diseases for Treatment or Prevention by the Method

-   -   Acute Disseminated Encephalomyelitis (ADEM)     -   Acute necrotizing hemorrhagic leukoencephalitis     -   Addison's disease     -   Agammaglobulinemia     -   Alopecia areata     -   Amyloidosis     -   Ankylosing spondylitis     -   Anti-GBM/Anti-TBM nephritis     -   Antiphospholipid syndrome (APS)     -   Autoimmune angioedema     -   Autoimmune aplastic anemia     -   Autoimmune dysautonomia     -   Autoimmune hepatitis     -   Autoimmune hyperlipidemia     -   Autoimmune immunodeficiency     -   Autoimmune inner ear disease (AIED)     -   Autoimmune myocarditis     -   Autoimmune oophoritis     -   Autoimmune pancreatitis     -   Autoimmune retinopathy     -   Autoimmune thrombocytopenic purpura (ATP)     -   Autoimmune thyroid disease     -   Autoimmune urticaria     -   Axonal & neuronal neuropathies     -   Balo disease     -   Behcet's disease     -   Bullous pemphigoid     -   Cardiomyopathy     -   Castleman disease     -   Celiac disease     -   Chagas disease     -   Chronic fatigue syndrome     -   Chronic inflammatory demyelinating polyneuropathy (CIDP)     -   Chronic recurrent multifocal ostomyelitis (CRMO)     -   Churg-Strauss syndrome     -   Cicatricial pemphigoid/benign mucosal pemphigoid     -   Crohn's disease     -   Cogans syndrome     -   Cold agglutinin disease     -   Congenital heart block     -   Coxsackie myocarditis     -   CREST disease     -   Essential mixed cryoglobulinemia     -   Demyelinating neuropathies     -   Dermatitis herpetiformis     -   Dermatomyositis     -   Devic's disease (neuromyelitis optica)     -   Discoid lupus     -   Dressler's syndrome     -   Endometriosis     -   Eosinophilic esophagitis     -   Eosinophilic fasciitis     -   Erythema nodosum     -   Experimental allergic encephalomyelitis     -   Evans syndrome     -   Fibromyalgia     -   Fibrosing alveolitis     -   Giant cell arteritis (temporal arteritis)     -   Giant cell myocarditis     -   Glomerulonephritis     -   Goodpasture's syndrome     -   Granulomatosis with Polyangiitis (GPA) (formerly called         Wegener's Granulomatosis)     -   Graves' disease     -   Guillain-Barre syndrome     -   Hashimoto's encephalitis     -   Hashimoto's thyroiditis     -   Hemolytic anemia     -   Henoch-Schonlein purpura     -   Herpes gestationis     -   Hypogammaglobulinemia     -   Idiopathic thrombocytopenic purpura (ITP)     -   IgA nephropathy     -   IgG4-related sclerosing disease     -   Immunoregulatory lipoproteins     -   Inclusion body myositis     -   Interstitial cystitis     -   Juvenile arthritis     -   Juvenile diabetes (Type 1 diabetes)     -   Juvenile myositis     -   Kawasaki syndrome     -   Lambert-Eaton syndrome     -   Leukocytoclastic vasculitis     -   Lichen planus     -   Lichen sclerosus     -   Ligneous conjunctivitis     -   Linear IgA disease (LAD)     -   Lupus (SLE)     -   Lyme disease, chronic     -   Meniere's disease     -   Microscopic polyangiitis     -   Mixed connective tissue disease (MCTD)     -   Mooren's ulcer     -   Mucha-Habermann disease     -   Multiple sclerosis     -   Myasthenia gravis     -   Myositis     -   Narcolepsy     -   Neuromyelitis optica (Devic's)     -   Neutropenia     -   Ocular cicatricial pemphigoid     -   Optic neuritis     -   Palindromic rheumatism     -   PANDAS (Pediatric Autoimmune Neuropsychiatric Disorders         Associated with Streptococcus)     -   Paraneoplastic cerebellar degeneration     -   Paroxysmal nocturnal hemoglobinuria (PNH)     -   Parry Romberg syndrome     -   Parsonnage-Turner syndrome     -   Pars planitis (peripheral uveitis)     -   Pemphigus     -   Peripheral neuropathy     -   Perivenous encephalomyelitis     -   Pernicious anemia     -   POEMS syndrome     -   Polyarteritis nodosa     -   Type I, II, & III autoimmune polyglandular syndromes     -   Polymyalgia rheumatica     -   Polymyositis     -   Postmyocardial infarction syndrome     -   Postpericardiotomy syndrome     -   Progesterone dermatitis     -   Primary biliary cirrhosis     -   Primary sclerosing cholangitis     -   Psoriasis     -   Psoriatic arthritis     -   Idiopathic pulmonary fibrosis     -   Pyoderma gangrenosum     -   Pure red cell aplasia     -   Raynauds phenomenon     -   Reactive Arthritis     -   Reflex sympathetic dystrophy     -   Reiter's syndrome     -   Relapsing polychondritis     -   Restless legs syndrome     -   Retroperitoneal fibrosis     -   Rheumatic fever     -   Rheumatoid arthritis     -   Sarcoidosis     -   Schmidt syndrome     -   Scleritis     -   Scleroderma     -   Sjogren's syndrome     -   Sperm & testicular autoimmunity     -   Stiff person syndrome     -   Subacute bacterial endocarditis (SBE)     -   Susac's syndrome     -   Sympathetic ophthalmia     -   Takayasu's arteritis     -   Temporal arteritis/Giant cell arteritis     -   Thrombocytopenic purpura (TTP)     -   Tolosa-Hunt syndrome     -   Transverse myelitis     -   Type 1 diabetes     -   Ulcerative colitis     -   Undifferentiated connective tissue disease (UCTD)     -   Uveitis     -   Vasculitis     -   Vesiculobullous dermatosis     -   Vitiligo     -   Wegener's granulomatosis (now termed Granulomatosis with         Polyangiitis (GPA).

Inflammatory Diseases for Treatment or Prevention by the Method

-   -   Alzheimer's     -   ankylosing spondylitis     -   arthritis (osteoarthritis, rheumatoid arthritis (RA), psoriatic         arthritis)     -   asthma     -   atherosclerosis     -   Crohn's disease     -   colitis     -   dermatitis     -   diverticulitis     -   fibromyalgia     -   hepatitis     -   irritable bowel syndrome (IBS)     -   systemic lupus erythematous (SLE)     -   nephritis     -   Parkinson's disease     -   ulcerative colitis.

In an example (eg, in the method of the invention involving a mixed bacterial population), the host cell (or first cell or second cell) genus or species is selected from a genus or species listed in Table 1. In examples of the present invention, the Cas (eg, Cas nuclease such as a Type I, II or III Cas, eg, a Cas3 or 9) is a Cas comprised by bacteria of a genus or species that is selected from a genus or species listed in Table 1, and optionally the host cell (or first cell or second cell) is of the same genus or species. In an example of this, the Cas is endogenous to said host cell (or first or second cell), which is useful for embodiments herein wherein endogenous Cas is used to modify a target sequence. In this case, the HM-array may comprise one or more repeat nucleotide (eg, DNA or RNA) sequences that is at least 90, 95, 96, 97, 98 or 99% identical (or is 100% identical) to a repeat sequence of said cell, genus or species, whereby the Cas is operable with cRNA encoded by the HM-array for modifying one or more target sequences in the cell. In an example, the Cas is a Type I Cas3 and is used with a Type I CASCADE, wherein one or or both of the Cas3 and CASCADE are endogenous to the host or first cells, or are vector-borne (ie, exogenous to the host or first cells).

In an example, the method of the invention selectively kills first cells in the microbiota whilst not targeting second cells, eg, wherein the second cells are (a) of a related strain to the strain of the first species or (b) of a species that is different to the first species and is phylogenetically related to the first species, wherein the second species or strain has a 16s ribosomal RNA-encoding DNA sequence that is at least 80% identical to an 16s ribosomal RNA-encoding DNA sequence of the first cell species or strain. In an embodiment, the first cells are of a first species selected from Table 1 and the second cells are of a different species selected from Table 1. In an example, the species are of the same genus or are of different genera.

It will be understood that particular embodiments described herein are shown by way of illustration and not as limitations of the invention. The principal features of this invention can be employed in various embodiments without departing from the scope of the invention. Those skilled in the art will recognize, or be able to ascertain using no more than routine study, numerous equivalents to the specific procedures described herein. Such equivalents are considered to be within the scope of this invention and are covered by the claims. All publications and patent applications mentioned in the specification are indicative of the level of skill of those skilled in the art to which this invention pertains. All publications and patent applications and all US equivalent patent applications and patents are herein incorporated by reference to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference. The use of the word “a” or “an” when used in conjunction with the term “comprising” in the claims and/or the specification may mean “one,” but it is also consistent with the meaning of “one or more,” “at least one,” and “one or more than one.” The use of the term “or” in the claims is used to mean “and/or” unless explicitly indicated to refer to alternatives only or the alternatives are mutually exclusive, although the disclosure supports a definition that refers to only alternatives and “and/or.” Throughout this application, the term “about” is used to indicate that a value includes the inherent variation of error for the device, the method being employed to determine the value, or the variation that exists among the study subjects.

As used in this specification and claim(s), the words “comprising” (and any form of comprising, such as “comprise” and “comprises”), “having” (and any form of having, such as “have” and “has”), “including” (and any form of including, such as “includes” and “include”) or “containing” (and any form of containing, such as “contains” and “contain”) are inclusive or open-ended and do not exclude additional, unrecited elements or method steps

The term “or combinations thereof” or similar as used herein refers to all permutations and combinations of the listed items preceding the term. For example, “A, B, C, or combinations thereof is intended to include at least one of: A, B, C, AB, AC, BC, or ABC, and if order is important in a particular context, also BA, CA, CB, CBA, BCA, ACB, BAC, or CAB. Continuing with this example, expressly included are combinations that contain repeats of one or more item or term, such as BB, AAA, MB, BBC, AAABCCCC, CBBAAA, CABABB, and so forth. The skilled artisan will understand that typically there is no limit on the number of items or terms in any combination, unless otherwise apparent from the context.

Any part of this disclosure may be read in combination with any other part of the disclosure, unless otherwise apparent from the context.

All of the compositions and/or methods disclosed and claimed herein can be made and executed without undue experimentation in light of the present disclosure. While the compositions and methods of this invention have been described in terms of preferred embodiments, it will be apparent to those of skill in the art that variations may be applied to the compositions and/or methods and in the steps or in the sequence of steps of the method described herein without departing from the concept, spirit and scope of the invention. All such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and concept of the invention as defined by the appended claims.

The present invention is described in more detail in the following non limiting Examples.

EXAMPLES Example 1: Specific Microbiota Bacterial Population Growth Inhibition by Harnessing Wild-Type Endogenous Cas

1. Material and methods

1.1. Strains

The following strains were used in the course of this Example and Examples 2 and 3: E. coli MG1655, E. coli TOP10, Streptococcus thermophilus LMD-9 (ATCC BAA-491, Manassas, Va.), Streptococcus thermophilus DSM 20617(T) (DSMZ, Braunschweig, Germany), Lactococcus lactis MG1363 and Streptococcus mutans Clarke 1924 DSM 20523 (DSMZ, Braunschweig, Germany).

During the course of media selection and testing of the genetic constructs different Streptoccoci strains were used. Streptococcus thermophilus LMD-9 (ATCC BAA-491) and Escherichia coli TOP10 were considered because of their compatible growth requirements. All strains were cultivated in Todd-Hewitt broth (TH) (T1438 Sigma-Aldrich), in aerobic conditions and at 37° C., unless elsewhere indicated. The strains were stored in 25% glycerol at −80° C.

1.2. Differential Growth Media

All strains were grown on TH media at 37° C. for 20 hours. Selective media for S. thermophilus was TH media supplemented with 3 g l⁻¹ of 2-phenylethanol (PEA). PEA was added to the media and autoclaved at 121° C. for 15 minutes at 15 psi. Agar plates were prepared by adding 1.5% (wt/vol) agar to the corresponding media. When necessary for selection or plasmid maintenance 30 μg ml⁻¹ kanamycin was used for both S. thermophilus strains and E. coli, and 500 μg ml⁻¹ for S. mutans.

In some cases, depending on the strain and plasmid, a longer incubation, up to 48 hours, may be needed to see growth on media supplemented with PEA. In order to control for the viability of the organisms used, a control TH agar must be done in parallel.

1.3. Cloning

E. coli (One Shot® ThermoFischer TOP10 Chemically Competent cells) was used in all subcloning procedures. PCR was carried out using Phusion polymerase. All PCR products were purified with Nucleospin Gel and PCR Clean-up by Macherey-Nagel following the manufacturer's protocol. The purified fragments were digested with restriction enzyme DpnI in 1×FD buffer with 1 μl enzyme in a total volume of 34 μl. The digested reaction was again purified with Nucleospin Gel and PCR Clean-up by Macherey-Nagel following the manufacturer's protocol. Gibson assembly was performed in 10 μl reactions following the manufacturer's protocol (NewEngland Biolab).

Plasmid DNA was prepared using Qiagen kits according to the manufacturer's instructions. Modifications for Gram-positive strains included growing bacteria in a medium supplemented with 0.5% glycine and lysozyme to facilitate cell lysis.

1.4. Transformation

1.4.1 Electro-Competent E. coli Cells and Transformation

Commercially electrocompetent cells were used for cloning and the experiments (One Shot® ThermoFischer TOP10 Chemically Competent E. coli). Electroporation was done using standard settings: 1800 V, 25 μF and 200Ω using an Electro Cell Manipulator (BTX Harvard Apparatus ECM630). Following the pulse, 1 ml LB-SOC media was added and the cells were incubated at 37° C. for 1 hour. The transformed cells were plated in LB-agar containing 50 μg ml⁻¹ of kanamycin.

1.4.2 Preparation of Electro-Competent S. thermophilus Cells

The electroporation protocol was modified from Somkuti and Steinberg, 1988. An overnight culture of Streptococcus thermophilus in TH Broth supplemented with 40 mM DL-threonine (T8375 Sigma-Aldrich) was diluted 100-fold in 5 ml of the same media and grown to an OD₆₀₀ between 0.3-0.5 (approximately 2.5 hours after inoculation). The cells were collected by centrifugation at 10,000×g for 10 min at 4° C. and washed three times with 5 ml of ice cold wash buffer (0.5 M sucrose+10% glycerol). After the cells were washed, they were suspended to an OD₆₀₀ of 15-30 in electroporation buffer (0.5 M sucrose, 10% glycerol and 1 mM MgCl₂). The cells in the electroporation buffer may be kept at 4° C. until use (within one hour) or aliquot 50 μl in eppendorf tubes, freezing them in liquid nitrogen and stored at −80° C. for later use.

1.4.3 Electroporation S. thermophilus Cells

1 μl of purified plasmid DNA was added to 50 μl of the cell suspension and electroporation was carried out in 2 mm-gap electroporation cuvettes pre-cooled. The electroporation setting were 2500 V, 25 μF and 200Ω using an Electro Cell Manipulator (BTX Harvard Apparatus ECM630). Immediately after the electric pulse, 1 ml of TH broth was added to the cells and the suspension was kept on ice for 10 minutes, subsequently the cells were incubated for 3 h at 37° C. After allowing time for expression of the resistance gene the cells were plated onto TH-agar plates containing 30 g ml⁻¹ of kanamycin. Depending on the construct, colonies were visible between 12 and 48 h of incubation at 37° C.

1.5. Construction of XylS Plasmid

All the plasmids used in this work were based on pBAV1K-T5, which is a broad-host range expression vector derived from the a cryptic plasmid pWV01 from Streptococcus cremoris (Bryksin & Matsumura, 2010), the backbone was amplified using that contain overhangs for assembly with the other fragments using Gibson's method.

The xylose inducible system was constructed by cloning the promoter gyrA in front of the XylR repressor (FIG. 1). The XylR repressor was amplified from Bacillus Subtilis strain SCK6 (Zhang et al. 2011) with the a reverse primer that includes an overhang for Gibson assembly and a forward primer, that is an ultramer used to introduce the gyrA promoter (Xie et al. 2013) and the corresponding overhang for assembly into pBAV1KT5 backbone. The resulting fragment was flanked by an mCherry amplified from pCL002 (unpublished work) with an ultramer that include Pldha+PxylA hybrid promoter (Xie et al. 2013). The three resulting PCR products were assembled in a Gibson Master Mix® (NewEngland Biolab) according to manufacturer's instructions. The product was finally transformed in E. coli TOP10 electrocompetent cells. See FIG. 1.

1.6. Design and construction of CRISPR array plasmid

Streptococcus thermophilus has 4 distinct CRISPR systems (Sapranauskas, et al. 2011), for this work the type II CRISPR1 (ST1-CRISPR) system was chosen. The design of the target sequence was based on the available genome sequence of LMD-9 (GenBank: CP000419.1). The ST1-CRISPR array was designed to contain only the CRISPR array repeats and spacers under a xylose inducible promoter (Xie et al. 2013), followed by the corresponding tracrRNA under a strong constitutive promoter for Streptococci species (Sorg et al. 2014) (FIG. 2).

The tracrRNA plays a role in the maturation of crRNA and it is processed by S. thermophilus endogenous RNase III, forming a complex with crRNA. This complex acts as a guide for the endonuclease ST1-Cas9 (Horvath & Barrangou, 2010). After transcription of the synthetic array from the xylose inducible promoter, the endogenous Cas9 and RNAses will process it into a functional gRNA. The gRNA/Cas9 complex will cause a double stranded break at the target location.

The design of the array used 2 specific target sequences high on GC content and a reduced portion of the tracrRNA (ie, a less than complete tracrRNA sequence), which has been suggested not to be necessary for proper maturation of crRNA (Horvath & Barrangou, 2010).

The 2 targets were an essential gene (DNA polymerase III subunit alpha) and an antibiotic resistance gene (tetA-like gene).

Primers were used to amplify pBAV1KT5-XylR-PldhA backbone. The CRISPR array gBlock and the backbone with overhangs were assembled in a Gibson Master Mix® according to manufacturer's instructions (NewEngland Biolabs). The product was finally transformed in E. coli TOP10 electrocompetent cells.

1.7. Characterization of Xylose Inducible System in Streptococcus thermophilus LMD-9

Overnight stationary-phase cultures were diluted 1:100 into TH broth with corresponding antibiotic. Mid-log cells were induced with different concentration of D-(+)-xylose (0, 0.001, 0.01, 0.1, 0.5 and 1% wt/vol) and the cell cultures were measured either directly in medium to assess the extent of autofluorescence of the media, on the cell suspension or the suspension buffer (PBS buffer). 20 μl samples of the cell cultures were diluted 1/10 on PBS buffer, on 96-well plates with flat bottoms. Fluorescence of cell suspensions or media was read on a plate reader. mCherry fluorescence was measured using an excitation wavelength of 558 nm and emission at 612 nm. Absorbance of the resuspended cells was measured at OD 600 nm. A minimum of three independent biological replicates was done for each experiment.

1.8. Activation of CRISPR Array in S. thermophilus

S. thermophilus LMD-9 and E. coli TOP10 both with the plasmid containing the CRISPR array targeting the DNA polymerase III and tetA of S. thermophilus were grown overnight in 3 ml cultures supplemented with 30 μg ml⁻¹ of kanamycin for plasmid maintenance. The next day 96 well deep well plates were inoculated with 500 μl of 1/100 of overnight culture in fresh TH media, supplemented with 30 μg ml⁻¹ kanamycin. Mid-log cell cultures were induced with 1% xylose. The killing effect was tested on S. thermophilus and E. coli alone. For each strain and condition tested a negative control was kept without xylose. The cells were grown till ˜OD 0.5 and next 10-fold serially diluted in TH media and using a 96-well replicator (Mettler Toledo Liquidator™ 96) 5 μL volume drops were spotted on TH agar and TH agar supplemented with g l⁻¹ PEA plates. The plates were incubated for 24H at 37° C. and the colony forming units (CFU) were calculated from triplicate measurements.

2. Results

2.1 Growth Condition and Selective Media

We first set out to establish the bacterial strains and cultivation protocol that would support growth for all strains we planned to use for the co-cultivation experiments. We used S. thermophilus strain LMD-9 which was able to support a similar growth as E. coli in TH broth at 37° C. (FIG. 3).

Distinguishing the different bacteria from a mixed culture is important in order to determine cell number of the different species. With MacConkey agar is possible to selectively grow E. coli, however there is no specific media for selective growth of S. thermophilus. PEA agar is a selective medium that is used for the isolation of gram-positive (S. thermophilus) from gram-negative (E. coli). Additionally, we found that different concentrations of PEA partially inhibit the growth of other gram positives, which allow for selection between the other gram-positive bacteria used in this work (FIG. 4). 3 g l⁻¹ of PEA proved to selectively grow S. thermophilus LMD-9 while limiting growth of E. coli.

2.2 Design and Validation of Inducible System

An induction system for Streptococcus species was previously developed based on the Bacillus megaterium xylose operon (FIG. 5) by creating a heterologous xylose induction cassette (Xyl-S). The xylR and xylA promoters were replaced with S. mutans' constitutively expressed gyrA and ldh promoters respectively. This expression cassette for Streptococcus species showed differences in sensitivity and expression levels between different species, however the system was not tested in S. thermophilus (Xie et al. 2013). Therefore we first set out to validate the xylose induction cassette in S. thermophilus.

An alternative version of the induction cassette was constructed by only replacing the xylR promoter with the S. mutans' gyrA promoter but left the endogenous B. megaterium xylA promoter intact. During the design of the xylose inducible system we considered both versions of the inducible promoter, the natural P_(XylA) promoter found in Bacillus megaterium and a hybrid promoter of the highly conserved promoter P_(ldha) fused with the repressor binding sites of P_(XylA) promoter (FIG. 5). Only a few Streptococcus species have been reported to metabolize xylose, and thus the presence of a regulatory machinery to recognize the xylA promoter in the other Streptococcus species is not likely. Therefore we constructed both xylose induction systems but only tested the inducibility of mCherry with the P_(ldha+XylA) system.

In order to determine mCherry inducible expression by xylose, mid-log cultures of cells with the plasmid (pBAV1KT5-XylR-mCherry-P_(ldha+XylA)) were induced with different concentrations of xylose. Six hours after the induction we measured mCherry fluorescence in the cultures, where we observed substantially higher overall expression levels in cells carrying the plasmid (FIG. 6). It is worth noticing that the system showed a substantial level of basal expression even in the cultures where xylose was not added. This means that the system is ‘leaky’ and in context of the kill-array this can lead to cell death even before the system is induced with xylose. However, in the subsequent course of this study we used both versions of the plasmid (pBAV1KT5-XylR-mCherry-P_(ldha+XylA) and pBAV1KT5-XylR-mCherry-PxylA).

2.3 Design of CRISPR/CAS9 Array

In order to determine if the genomic targeting spacers in a CRISPR array can cause death in S. thermophilus LMD-9, we inserted the CRISPR array we designed into the two xylose inducible systems previously constructed (pBAV1KT5-XylR-mCherry-P_(ldha+XylA) and pBAV1KT5-XylR-mCherry-P_(xylA)). In these plasmids we replaced mCherry with the gBlock containing the CRISPR array (FIG. 7). The variant with the P_(ldha+XylA) promoter was expected to be stronger and have a higher basal activity than the P_(xylA) (Xie et al. 2013).

2.4 Inhibition of Bacterial Population Growth Using Endogenous Cas9

After we constructed the plasmids in E. coli, we transformed the plasmids into S. thermophilus. This would allow us to determine if we could cause cell death of a specific bacterial species. Interestingly, bacterial host population size (indicated by growing bacteria and counting colony numbers on agar plates) in S. thermophilus exposed to the plasmid containing the strong P_(ldh+XylA) hybrid promoter was 10-fold less when compared to S. thermophilus exposed to the plasmid containing the weak, normal P_(xylA) promoter (FIG. 8; 52 colonies with the strong array expression versus 556 colonies with weak array expression, 10.7-fold difference), the 2 strains having been transformed in parallel using the same batch of electrocompetent S. thermophilus cells. This suggests to us that the plasmid carrying the CRISPR array targeting S. thermophilus genes is able to kill the cells using the endogenous Cas nuclease and RNase III, thereby inhibiting population growth by 10-fold.

We expect that weak array expression in host cells transformed by the plasmid comprising the P_(xylA) promoter led to a degree of cell killing, albeit much less than with the strong promoter plasmid. We expect that population growth inhibition that is greater than the observed 10-fold inhibition would be determined if a comparison of the activity of strong array expression was made with S thermophilus that is not exposed to any array-encoding plasmid (such as bacteria directly isolated from gut microbiota). Thus, we believe that array (or single guide RNA) expression in host cells for harnessing endogenous Cas nuclease will be useful for providing effective growth inhibition of target host cells in environmental, medical and other settings mentioned herein. Co-administration of antibiotic may also be useful to enhance the growth inhibition, particularly when one or more antibiotic resistance genes are targeted.

3. Discussion and Outlook

In this study we set out to design a CRISPR-array to specifically kill S. thermophilus using the endogenous Cas9 system. In order to gain control over the killing signal we sought to apply an inducible system that can be applied in S. thermophilus. The xylose inducible XylR system from B. megaterium was previously applied in S. mutans (Xie, 2013) but not in S. thermophilus. In this study we demonstrated the functionality of the xylR induction system using the designed XylR-mCherry-Pldha circuit in S. thermophilus. We found 0.1% wt/vol is sufficient to fully induce the XylR system in S. thermophilus (FIG. 6).

In order to observe abundance when co-culturing S. thermophilus and E. coli we established that supplementation of the culture media with 3 g l⁻¹ of PEA, allows for the selective growth of S. thermophilus while limiting the growth of E. coli (FIG. 4).

A ST1-CRISPR array, targeting the DNA polymerase III subunit alpha and a tetA like gene in the S. thermophilus LMD-9 genome, was placed under the xylose inducible promoter (Xie et al. 2013). Targeting these regions should lead to a double strand break and thus limit S. thermophilus viability (FIG. 9). Since the engineered array was designed to target S. thermophilus genome using the endogenous CRISPR/Cas machinery to process the encoded CRISPR array, the array is expected to have no influence on growth of unrelated strains such as E. coli, even similar targets could be found on its genome. This was successfully tested in a mixed bacterial population (simulating aspects of a human microbiota) as discussed in Example 3.

The demonstration of the ability to inhibit host cell growth on a surface is important and desirable in embodiments where the invention is for treating or preventing diseases or conditions mediated or caused by microbiota as disclosed herein in a human or animal subject. Such microbiota are typically in contact with tissue of the subject (eg, gut tissue) and thus we believe that the demonstration of activity to inhibit growth of a microbiota bacterial species (exemplified by Streptococcus) on a surface supports this utility.

Example 2: Specific Microbiota Bacterial Population Growth Inhibition in Different Strains

Example 1 demonstrated specific growth inhibition of Streptococcus thermophilus LMD-9. Here we demonstrate growth inhibition can also be obtained in a second strain: Streptococcus thermophilus DSM 20617. Methods described in Example 1 were, therefore, applied to the latter strain (except that selective media for S. thermophilus DSM 20617 was TH media supplemented with 2.5 g l⁻¹ of 2-phenylethanol (PEA)).

Streptococcus thermophilus DSM 20617 transformed with the CRISPR array plasmids were incubated for recovery in liquid media for a period of 3 hours at 37° C. that would allow for expression of kanamycin resistance. After a recovery period, cells were plated in different selection media in presence of 1% xylose in order to induce cell death, and without xylose as a control (FIG. 10). It is evident that; (1) by xylose induction the growth of S. thermophilus can be inhibited (around 10-fold for the ‘strong’ promoter plasmid versus control), (2) the ‘strong’ system (pBAV1KT5-XylR-CRISPR-P_(ldhA)) results in more growth reduction than the ‘weak’ system (pBAV1KT5-XylR-CRISPR-P_(xylA))

Example 3: Selective Bacterial Population Growth Inhibition in a Mixed Consortium of Different Microbiota Species

We next demonstrated selective growth inhibition of a specific bacterial species in a mixed population of three species. We selected species found in gut microbiota of humans and animals (S thermophilus DSM 20617(T), Lactobacillus lactis and E coli). We included two gram-positive species (the S thermophilus and L lactis) to see if this would affect the ability for selective killing of the former species; furthermore to increase difficulty (and to more closely simulate situations in microbiota) L lactis was chosen as this is a phylogenetically-related species to S thermophilus (as indicated by high 16s ribosomal RNA sequence identity between the two species). The S thermophilus and L lactis are both Firmicutes. Furthermore, to simulate microbiota, a human commensal gut species (E coli) was included.

1. Materials & Methods

Methods as set out in Example 1 were used (except that selective media was TH media supplemented with 2.5 g l⁻¹ of 2-phenylethanol (PEA)).

1.1 Preparation of Electro-Competent L. lactis Cells

Overnight cultures of L. lactis in TH media supplemented with 0.5 M sucrose and 1% glycine were diluted 100-fold in 5 ml of the same media and grown at 30° C. to an OD₆₀₀ between 0.2-0.7 (approximately 2 hours after inoculation). The cells were collected at 7000× g for 5 min at 4° C. and washed three times with 5 ml of ice cold wash buffer (0.5 M sucrose+10% glycerol). After the cells were washed, they were suspended to an OD₆₀₀ of 15-30 in electroporation buffer (0.5 M sucrose, 10% glycerol and 1 mM MgCl₂). The cells in the electroporation buffer were kept at 4° C. until use (within one hour) or aliquot 50 μl in eppendorf tubes, freezing them in liquid nitrogen and stored at −80° C. for later use.

Electroporation conditions for all species were as described in Example 1.

1.2 Activation of CRISPR Array: Consortium Experiments.

S. thermophilus DSM 20617, L. lactis MG1363 and E. coli TOP10 were genetically transformed with the plasmid containing the CRISPR array targeting the DNA polymerase III and tetA of S. thermophilus. After transformation all cells were grown alone and in co-culture for 3 hours at 37° C. allowing for recovery to develop the antibiotic resistance encoded in the plasmid. We decided to use transformation efficiency as a read out of CRISPR-encoded growth inhibition. Therefore, after allowing the cells for recovery the cultures were plated in TH media, TH supplemented with PEA and MacConkey agar all supplemented with Kanamycin, and induced by 1% xylose.

2. Results

2.0 Phylogenetic Distance Between L. lactis, E. Coli and S. thermophilus

The calculated sequence similarity in the 16S rRNA-encoding DNA sequence of the S. thermophilus and L. lactis was determined as 83.3%. The following 16S sequences were used: E. coli: AB030918.1, S. thermophilus: AY188354.1, L. lactis: AB030918. The sequences were aligned with needle (world wide web.ebi.ac.uk/Tools/psa/emboss_needle/nucleotide.html) with the following parameters: -gapopen 10.0 -gapextend 0.5 -endopen 10.0 -endextend 0.5 -aformat3 pair -snucleotide1 -snucleotide2. FIG. 11 shows the maximum-likelihood phylogenetic tree of 16S sequences from S. thermophilus, L. lactis and E. coli.

2.1 Growth Condition and Selective Media

S. thermophilus and L. lactis are commonly used in combination in many fermented foods and yoghurt. We chose these strains since they are commonly known to be gut microbes that form an intimate association with the host and previous characterizations of the 16S ribosomal RNA region of S. thermophilus and L. lactis have shown that these organisms are phylogenetically closely related (Ludwig et al., 1995). In parallel we also evaluated the growth of E. coli for our mixed population co-culture experiments, since this organism is also commonly found in gut microbe communities. We first set out to establish the bacterial strains and cultivation protocol that would support growth for all strains we planned to use for the co-cultivation experiments. We found that all strains were able to support growth in TH broth at 37° C. (FIG. 3).

Distinguishing the different bacteria from a mixed culture is important in order to determine cell number of the different species. With MacConkey agar is possible to selectively grow E. coli, however there is no specific media for selective growth of S. thermophilus. PEA agar is a selective medium that is used for the isolation of gram-positive (S. thermophilus) from gram-negative (E. coli). Additionally, different concentrations of PEA partially inhibit the growth of the different grams positive species and strains, which allow for selection between the other gram-positive bacteria used in this work. Using 2.5 g l⁻¹ of PEA proved to selectively grow S. thermophilus while limiting growth of L. lactis and E. coli.

All strains were transformed with a plasmid that used the vector backbone of pBAV1KT5 that has a kanamycin selection marker; we found that using media supplemented with 30 ug ml⁻¹ of kanamycin was enough to grow the cells while keeping the plasmid.

2.3 Transformation & Selective Growth Inhibition in a Mixed Population

We transformed S. thermophilus, L. lactis and E. coli with plasmid containing the CRISPR array and cultured them in a consortium of all the bacterial species combined in equal parts, which would allow us to determine if we could cause cell death specifically in S. thermophilus. We transformed all the species with either the pBAV1KT5-XylR-CRISPR-P_(XylA) or pBAV1KT5-XylR-CRISPR-P_(ldha+XylA) plasmid.

-   -   ‘FIG. 12 shows the selective S thermophilus growth inhibition in         a co-culture of E. coli, L. lactis and S. thermophilus harboring         either the pBAV1KT5-XylR-CRISPR-P_(xylA) or the         pBAV1KT5-XylR-CRISPR-P_(ldhA+XylA) plasmid. No growth difference         is observed between E. coli harboring the         pBAV1KT5-XylR-CRISPR-P_(xylA) or the         pBAV1KT5-XylR-CRISPR-P_(ldhA+XylA) plasmid (middle column).         However, S. thermophilus (selectively grown on TH agar         supplemented with 2.5 gl⁻¹ PEA, last column) shows a decrease in         transformation efficiency between the         pBAV1KT5-XylR-CRISPR-P_(xylA) (strong) or the         pBAV1KT5-XylR-CRISPR-P_(ldhA+XylA) (weak) plasmid as we         expected. We thus demonstrated a selective growth inhibition of         the target S thermophilus sub-population in the mixed population         of cells.

REFERENCES

-   1. Barrangou, R., Fremaux, C., Deveau, H., Richards, M., Patrick     Boyaval, Moineau, S., . . . Horvath, P. (2007). CRISPR Provides     Acquired Resistance Against Viruses in Prokaryotes. Science,     315(March), 1709-1712. -   2. Bryksin, A. V, & Matsumura, I. (2010). Rational design of a     plasmid origin that replicates efficiently in both gram-positive and     gram-negative bacteria. PloS One, 5(10), e13244. -   3. Chan C T Y, Lee J W, Cameron D E, Bashor C J, Collins J J:     “Deadman” and “Passcode” microbial kill switches for bacterial     containment. Nat Chem Biol 2015, 12(December): 1-7. -   4. Horvath, P., Romero, D. A., Coûté-Monvoisin, A.-C., Richards, M.,     Deveau, H., Moineau, S., . . . Barrangou, R. (2008). Diversity,     activity, and evolution of CRISPR loci in Streptococcus     thermophilus. Journal of Bacteriology, 190(4), 1401-12. -   5. Ludwig, E. S., Klipper, R., Magrum L., Wose C., &     Stackebrandt, E. (1985). The phylogenetic position of Streptococcus     and Enterococcus. Journal of Gencwl Microhiologj., 131, 543-55 1. -   6. Mercenier, A. (1990). Molecular genetics of Streptococcus     thermophilus. FEMS Microbiology Letters, 87(1-2), 61-77. -   7. Samarzija, D., Antunac, N., & Havranek, J. (2001). Taxonomy,     physiology and growth of Lactococcus lactis: a review. Mljekarstvo,     51(1), 35-48. Retrieved from -   8. Sapranauskas, R., Gasiunas, G., Fremaux, C., Barrangou, R.,     Horvath, P., & Siksnys, V. (2011). The Streptococcus thermophilus     CRISPR/Cas system provides immunity in Escherichia coli. Nucleic     Acids Research, 39(21), 9275-9282. -   9. Somkuti, G. A., & Steinberg, D. H. (1988). Genetic transformation     of Streptococcus thermophilus by electroporation. Biochimie, 70(4),     579-585 -   10. Sorg, R. A., Kuipers, O. P., & Veening, J.-W. (2014). Gene     expression platform for synthetic biology in the human pathogen     Streptococcus pneumoniae. ACS Synthetic Biology, 4(3), 228-239. -   11. Suvorov, a. (1988). Transformation of group A streptococci by     electroporation. FEMS Microbiology Letters, 56(1), 95-99. -   12. Xie, Z., Qi, F., & Merritt, J. (2013). Development of a tunable     wide-range gene induction system useful for the study of     streptococcal toxin-antitoxin systems. Applied and Environmental     Microbiology, 79(20), 6375-84. -   13. Zhang, X. Z., & Zhang, Y. H. P. (2011). Simple, fast and     high-efficiency transformation system for directed evolution of     cellulase in Bacillus subtilis. Microbial Biotechnology, 4(1),     98-105.

Example 4: Altering the Ratio of Clostridium dificile in a Mixed Gut Microbiota Population

Alteration of the ratio of bacteria will be performed according to the present example, which is described by reference to knocking-down Clostridium dificile bacteria in a mixed gut microbiota sample. The sample will contain Bacteroides and metronidazole (MTZ)-resistant C dificile strain 630 sub-populations. Ex vivo the mixed population is combined with a population of carrier bacteria (Lactobacillus acidophilus La-14 and/or La-5) that have been engineered to contain CRISPR arrays.

Each CRISPR array is comprised on a plasmid that is compatible with the carrier bacterium and C dificile cells. The array is comprised by a Bacteroides thetaiotamicron CTnDot transposon that also comprises oriT, an intDOT sequence, a tetQ-rteA-rteB operon, rteC and the operon xis2c-xis2d-orf3-exc. In one experiment, mob and tra operons are excluded (instead relying on these supplied by Bacteroides cells to which the transposons are transferred in the mixture combined with the carrier bacteria). In another experiment, the mob and tra operons are included in the transposons.

Protein translocation across the cytoplasmic membrane is an essential process in all bacteria. The Sec system, comprising at its core an ATPase, SecA, and a membrane channel, SecYEG, is responsible for the majority of this protein transport. A second parallel Sec system has been described in a number of Gram-positive species. This accessory Sec system is characterized by the presence of a second copy of the energizing ATPase, SecA2; where it has been studied, SecA2 is responsible for the translocation of a subset of Sec substrates. In common with many pathogenic Gram-positive species, Clostridium difficile possesses two copies of SecA. Export of the S-layer proteins (SLPs) and an additional cell wall protein (CwpV) is dependent on SecA2. Accumulation of the cytoplasmic precursor of the SLPs SlpA and other cell wall proteins is observed in cells expressing dominant-negative secA1 or secA2 alleles, concomitant with a decrease in the levels of mature SLPs in the cell wall. Furthermore, expression of either dominant-negative allele or antisense RNA knockdown of SecA1 or SecA2 dramatically impairs growth, indicating that both Sec systems are essential in C. difficile.

C. difficile Strain 630 (epidemic type X) has a single circular chromosome with 4,290,252 bp (G+C content=29.06%) and a circular plasmid with 7,881 bp (G+C content=27.9%). The whole genome has been sequenced and found that 11% of the genome consists of mobile genetic elements such as conjugative transposons. These elements provide C. difficile with the genes responsible for its antimicrobial resistance, virulence, host interaction and the production of surface structures. For example, the cdeA gene of C. difficile produces a multidrug efflux pump which was shown to be homologous to known efflux transporters in the multidrug and toxic compound extrusion (MATE) family. The protein facilitates energy-dependent and sodium-coupled efflux of drugs from cells. In addition, the cme gene in C. difficile has been shown to provide multidrug resistance in other bacteria.

The array comprises a R1-S1-R1′ CRISPR unit (spacer flanked by two CRISPR repeats) for targeting a sequence in an essential gene (SecA2) of C dificile cells. In another experiment, targeting is to the cdeA gene in the presence of MTZ and optionally one or more other anti-C dificile antibiotics. Each spacer (S) comprises a 20mer nucleotide sequence of the SecA or cdeA gene, wherein the sequence comprises a PAM of a C dificile strain 630 CRISPR/Cas system that is cognate to the repeat sequences. Each repeat is identical to a C dificile strain 630 repeat.

The repeats function with Cas that is endogenous to the C dificile cells in the mixed population. The mixed population of bacteria is retrieved as an ex vivo sample from a stool sample of a human patient suffering from C dificile infection. The mixed population is mixed with the carrier bacteria in vitro and incubated at 37 degrees centigrade under anaerobic conditions to simulate gut conditions in the presence of tetracycline. It is expected that transposons containing the CRISPR arrays will be transferred to Bacteroides and C dificile cells in the mixture. Furthermore, it is expected that the target sites in the latter cells will be cut by Cas nuclease action, thus reducing the proportion of C dificile in the mixed population (and increasing the ratio of Bacteroides versus C dificile).

In a follow-on experiment, a drink is produced comprising the carrier bacteria and this is consumed by the human patient once or twice for several consecutive days with or without an ant-acid. The patient is also administered with tetracycline during the treatment period. It is expected that stool analysis will reveal that the proportion of C dificile in the stool samples will reduce (and the ratio of Bacteroides versus C dificile will increase).

Example 5: Vector-Encoded System for Selective Species & Strain Growth Inhibition in a Mixed Bacterial Consortium

In Example 3 we surprisingly established the possibility of harnessing endogenous Cas nuclease activity in host bacteria for selective population growth inhibition in a mixed consortium of different species. We next explored the possibility of instead using vector-encoded Cas activity for selective population growth inhibition in a mixed consortium of different species. We demonstrated selective growth inhibition of a specific bacterial species in a mixed population of three different species, and further including a strain alternative to the target bacteria. We could surprisingly show selective growth inhibition of just the target strain of the predetermined target species. Furthermore, the alternative strain was not targeted by the vector-encoded CRISPR/Cas system, which was desirable for establishing the fine specificity of such vector-borne systems in a mixed bacterial consortium that mimicked human or animal gut microbiota elements.

We selected species found in gut microbiota of humans and animals (Bacillus subtilis, Lactobacillus lactis and E coli). We included two strains of the human commensal gut species, E coli. We thought it of interest to see if we could distinguish between closely related strains that nevertheless had sequence differences that we could use to target killing in one strain, but not the other. This was of interest as some strains of E coli in microbiota are desirable, whereas others may be undesirable (eg, pathogenic to humans or animals) and thus could be targets for Cas modification to knock-down that strain.

1. Material and Methods 1.1. Plasmids and Strains

See Tables 7 and 8. All strains were cultivated in Todd-Hewitt broth (TH) (T1438 Sigma-Aldrich), in aerobic conditions and at 37° C., unless elsewhere indicated. The strains were stored in 25% glycerol at −80° C.

The self-targeting sgRNA-Cas9 complex was tightly regulated by a theophylline riboswitch and the AraC/P_(BAD) expression system respectively. Tight regulation of Cas9 is desired in order to be carried stably in E. coli. The plasmid contained the exogenous Cas9 from Streptococcus pyogenes with a single guide RNA (sgRNA) targeting E. coli's K-12 strains. Therefore K-12 derived strains TOP10 was susceptible to double strand self-cleavage and consequent death when the system was activated. E. coli strains like Nissle don't have the same target sequence therefore they were unaffected by the sgRNA-Cas9 activity. See Tables 9-11 below, which show sequences used in Example 9. We chose a target sequence (ribosomal RNA-encoding sequence) that is conserved in the target cells and present in multiple copies (7 copies), which increased the chances of cutting host cell genomes in multiple places to promote killing using a single gRNA design.

FIG. 13 shows regulators controlling the expression of spCas9 and the self-targeting sgRNA targeting the ribosomal RNA subunit 16s.

1.2. Differential Growth Media

All strains were grown on TH media at 37° C. for 20 hours. Selective media for B. subtilis was TH media supplemented with 2.5 g l⁻¹ of 2-phenylethanol (PEA). PEA was added to the media and autoclaved at 121° C. for 15 minutes at 15 psi. Agar plates were prepared by adding 1.5% (wt/vol) agar to the corresponding media.

1.3. Cloning

E. coli (One Shot® ThermoFischer TOP10 Chemically Competent cells) was used in all subcloning procedures. PCR was carried out using Phusion™ polymerase. All PCR products were purified with Nucleospin™ Gel and PCR Clean-up by Macherey-Nagel™ following the manufacturer's protocol. The purified fragments were digested with restriction enzyme DpnI in 1×FD buffer with 1 μl enzyme in a total volume of 34 μl. The digested reaction was again purified with Nucleospin Gel and PCR Clean-up by Macherey-Nagel following the manufacturer's protocol. Gibson assembly was performed in 10 μl reactions following the manufacturer's protocol (NewEngland Biolab).

Plasmid DNA was prepared using Qiagen kits according to the manufacturer's instructions. Modifications for Gram-positive strains included growing bacteria in a medium supplemented with 0.5% glycine and lysozyme to facilitate cell lysis.

1.4. Transformation

1.4.1 Electro-Competent E. coli Cells and Transformation

Commercially electrocompetent cells were used for cloning and the experiments (One Shot® ThermoFischer TOP10 electrompetent E. coli). Electroporation was done using standard settings: 1800 V, 25 μF and 200Ω using an Electro Cell Manipulator (BTX Harvard Apparatus ECM630). Following the pulse, 1 ml LB-SOC media was added and the cells were incubated at 37° C. for 1 hour. The transformed cells were plated in LB-agar containing the corresponding antibiotics.

1.5. Activation of sgRNA-Cas9 in E. coli and Consortium Experiments.

E. coli TOP10 and Nissle both with the plasmid containing the sgRNA targeting the ribosomal RNA-encoding sequence of K-12 derived strains and the other bacteria were grown overnight in 3 ml of TH broth. The next day the cells were diluted to ˜OD 0.5 and next 10-fold serially diluted in TH media and using a 96-well replicator (Mettler Toledo Liquidator™ 96) 4 μL volume drops were spotted on TH agar, TH agar with inducers (1% arabinose and 2 mM theophylline), TH agar supplemented with 2.5 g l⁻¹ PEA and MacConkey agar supplemented with 1% maltose. The plates were incubated for 20 h at 37° C. and the colony forming units (CFU) were calculated from triplicate measurements.

2. Results

2.1 Specific Targeting of E. coli Strains Using an Exogenous CRISPR-Cas9 System

We first tested if the system could differentiate between two E. coli strains by introducing the killing system in both E. coli TOP10 and Nissle.

2.1 Targeting of E. coli Using an Exogenous CRISPR-Cas9 System in a Mixed Culture

Serial dilutions of overnight cultures were done in duplicate for both E. coli strains, B. subtilis, L. lactis, and in triplicate for the mixed cultures. All strains were grown at 37° C. for 20 hours in selective plates with and without the inducers. Induction of the system activates the sgRNA-Cas9 targeting K-12 derived strains, while leaving intact the other bacteria.

Distinguishing the different bacteria from a mixed culture is important in order to determine cell numbers of the different species and determine the specific removal of a species. MacConkey agar selectively grows E. coli, PEA agar is a selective medium that is used for the isolation of gram-positive (B. subtilis) from gram-negative (E. coli). Additionally, we found that different concentrations of PEA partially inhibit the growth of other gram positives. 2.5 g l⁻¹ of PEA proved to selectively grow B. subtilis while limiting growth of E. coli and L. lactis.

FIG. 14 shows specific targeting of E. coli strain by the inducible, exogenous, vector-borne CRISPR-Cas system. The sgRNA target the genome of K-12 derived E. coli strain E. coli TOP10, while the other E. coli strain tested was unaffected.

FIG. 15 shows spot assay with serial dilutions of individual bacterial species used in this study and mixed culture in TH agar without induction of the CRISPR-Cas9 system.

FIG. 16 shows a spot assay of the dilution 10³ on different selective media. TH with 2.5 g l⁻¹ PEA is a selective media for B. subtilis alone. MacConkey supplemented with maltose is a selective and differential culture medium for bacteria designed to selectively isolate Gram-negative and enteric bacilli and differentiate them based on maltose fermentation. Therefore TOP10 ΔmalK mutant makes white colonies on the plates while Nissle makes pink colonies; A is E coli ΔmalK, B is E coli Nissile, C is B subtilis, D is L lactis, E is mixed culture; the images at MacConkey−/B and E appear pink; the images at MacConkey+/B and E appear pink. FIG. 17 shows selective growth of the bacteria used in this study on different media and selective plates. It can be seen that we clearly, selectively killed the target E coli strain (“E coli” on x-axis in FIG. 17) in the mixed population, whereas the other related strain (“E coli-Nissle”) was not similarly killed. Killing of the target strain in the mixed population was 1000-fold in this experiment.

REFERENCES

-   1. Zhang, X. Z., & Zhang, Y. H. P. (2011). Simple, fast and     high-efficiency transformation system for directed evolution of     cellulase in Bacillus subtilis. Microbial Biotechnology, 4(1),     98-105. doi.org/10.1111/j.1751-7915.2010.00230.x -   2. Wegmann, U., O'Connell-Motherway, M., Zomer, A., Buist, G.,     Shearman, C., Canchaya, C., . . . Kok, J. (2007). Complete genome     sequence of the prototype lactic acid bacterium Lactococcus lactis     subsp. cremoris MG1363. Journal of Bacteriology, 189(8), 3256-70.     doi.org/10.1128/JB.01768-06

TABLE 1 EXAMPLE BACTERIA Abiotrophia Acidocella Actinomyces Alkalilimnicola Aquaspirillum Abiotrophia Acidocella Actinomyces bovis Alkalilimnicola Aquaspirillum defectiva aminolytica Actinomyces ehrlichii polymorphum Acaricomes Acidocella facilis denticolens Alkaliphilus Aquaspirillum Acaricomes Acidomonas Actinomyces Alkaliphilus putridiconchylium phytoseiuli Acidomonas europaeus oremlandii Aquaspirillum Acetitomaculum methanolica Actinomyces Alkaliphilus serpens Acetitomaculum Acidothermus georgiae transvaalensis Aquimarina ruminis Acidothermus Actinomyces Allochromatium Aquimarina Acetivibrio cellulolyticus gerencseriae Allochromatium latercula Acetivibrio Acidovorax Actinomyces vinosum Arcanobacterium cellulolyticus Acidovorax hordeovulneris Alloiococcus Arcanobacterium Acetivibrio anthurii Actinomyces Alloiococcus otitis haemolyticum ethanolgignens Acidovorax caeni howellii Allokutzneria Arcanobacterium Acetivibrio Acidovorax Actinomyces Allokutzneria albata pyogenes multivorans cattleyae hyovaginalis Altererythrobacter Archangium Acetoanaerobium Acidovorax citrulli Actinomyces Altererythrobacter Archangium Acetoanaerobium Acidovorax israelii ishigakiensis gephyra noterae defluvii Actinomyces Altermonas Arcobacter Acetobacter Acidovorax johnsonii Altermonas Arcobacter butzleri Acetobacter aceti delafieldii Actinomyces haloplanktis Arcobacter Acetobacter Acidovorax facilis meyeri Altermonas cryaerophilus cerevisiae Acidovorax Actinomyces macleodii Arcobacter Acetobacter konjaci naeslundii Alysiella halophilus cibinongensis Acidovorax Actinomyces neuii Alysiella crassa Arcobacter Acetobacter temperans Actinomyces Alysiella filiformis nitrofigilis estunensis Acidovorax odontolyticus Aminobacter Arcobacter Acetobacter valerianellae Actinomyces oris Aminobacter skirrowii fabarum Acinetobacter Actinomyces aganoensis Arhodomonas Acetobacter Acinetobacter radingae Aminobacter Arhodomonas ghanensis baumannii Actinomyces aminovorans aquaeolei Acetobacter Acinetobacter slackii Aminobacter Arsenophonus indonesiensis baylyi Actinomyces niigataensis Arsenophonus Acetobacter Acinetobacter turicensis Aminobacterium nasoniae lovaniensis bouvetii Actinomyces Aminobacterium Arthrobacter Acetobacter Acinetobacter viscosus mobile Arthrobacter agilis malorum calcoaceticus Actinoplanes Aminomonas Arthrobacter albus Acetobacter Acinetobacter Actinoplanes Aminomonas Arthrobacter nitrogenifigens gerneri auranticolor paucivorans aurescens Acetobacter oeni Acinetobacter Actinoplanes Ammoniphilus Arthrobacter Acetobacter haemolyticus brasiliensis Ammoniphilus chlorophenolicus orientalis Acinetobacter Actinoplanes oxalaticus Arthrobacter Acetobacter johnsonii consettensis Ammoniphilus citreus orleanensis Acinetobacter junii Actinoplanes oxalivorans Arthrobacter Acetobacter Acinetobacter deccanensis Amphibacillus crystallopoietes pasteurianus lwoffi Actinoplanes Amphibacillus Arthrobacter Acetobacter Acinetobacter derwentensis xylanus cumminsii pornorurn parvus Actinoplanes Amphritea Arthrobacter Acetobacter Acinetobacter digitatis Amphritea balenae globiformis senegalensis radioresistens Actinoplanes Amphritea japonica Arthrobacter Acetobacter Acinetobacter durhamensis Amycolatopsis histidinolovorans xylinus schindleri Actinoplanes Amycolatopsis alba Arthrobacter ilicis Acetobacterium Acinetobacter soli ferrugineus Amycolatopsis Arthrobacter luteus Acetobacterium Acinetobacter Actinoplanes albidoflavus Arthrobacter bakii tandoii globisporus Amycolatopsis methylotrophus Acetobacterium Acinetobacter Actinoplanes azurea Arthrobacter carbinolicum tjernbergiae humidus Amycolatopsis mysorens Acetobacterium Acinetobacter Actinoplanes coloradensis Arthrobacter dehalogenans towneri italicus Amycolatopsis nicotianae Acetobacterium Acinetobacter Actinoplanes lurida Arthrobacter fimetarium ursingii liguriensis Amycolatopsis nicotinovorans Acetobacterium Acinetobacter Actinoplanes mediterranei Arthrobacter malicum venetianus lobatus Amycolatopsis oxydans Acetobacterium Acrocarpospora Actinoplanes rifamycinica Arthrobacter paludosum Acrocarpospora missouriensis Amycolatopsis pascens Acetobacterium corrugata Actinoplanes rubida Arthrobacter tundrae Acrocarpospora palleronii Amycolatopsis phenanthrenivorans Acetobacterium macrocephala Actinoplanes sulphurea Arthrobacter wieringae Acrocarpospora philippinensis Amycolatopsis polychromogenes Acetobacterium pleiomorpha Actinoplanes tolypomycina Atrhrobacter woodii Actibacter rectilineatus Anabaena protophormiae Acetofilamentum Actibacter Actinoplanes Anabaena cylindrica Arthrobacter Acetofilamentum sediminis regularis Anabaena flosaquae psychrolactophilus rigidum Actinoalloteichus Actinoplanes Anabaena variabilis Arthrobacter Acetohalobium Actinoalloteichus teichomyceticus Anaeroarcus ramosus Acetohalobium cyanogriseus Actinoplanes Anaeroarcus Arthrobacter arabaticum Actinoalloteichus utahensis burkinensis sulfonivorans Acetomicrobium hymeniacidonis Actinopolyspora Anaerobaculum Arthrobacter Acetomicrobium Actinoalloteichus Actinopolyspora Anaerobaculum sulfureus faecale spitiensis halophila mobile Arthrobacter Acetomicrobium Actinobaccillus Actinopolyspora Anaerobiospirillum uratoxydans flavidum Actinobacillus mortivallis Anaerobiospirillum Arthrobacter Acetonema capsulatus Actinosynnema succiniciproducens ureafaciens Acetonema longum Actinobacillus Actinosynnema Anaerobiospirillum Arthrobacter Acetothermus delphinicola mirum thomasii viscosus Acetothermus Actinobacillus Actinotalea Anaerococcus Arthrobacter paucivorans hominis Actinotalea Anaerococcus woluwensis Acholeplasma Actinobacillus fermentans hydrogenalis Asaia Acholeplasma indolicus Aerococcus Anaerococcus Asaia bogorensis axanthum Actinobacillus Aerococcus lactolyticus Asanoa Acholeplasma lignieresii sanguinicola Anaerococcus Asanoa ferruginea brassicae Actinobacillus Aerococcus urinae prevotii Asticcacaulis Acholeplasma minor Aerococcus Anaerococcus Asticcacaulis cavigenitalium Actinobacillus urinaeequi tetradius biprosthecium Acholeplasma muris Aerococcus Anaerococcus Asticcacaulis equifetale Actinobacillus urinaehominis vaginalis excentricus Acholeplasma pleuropneumoniae Aerococcus Anaerofustis Atopobacter granularum Actinobacillus viridans Anaerofustis Atopobacter Acholeplasma porcinus Aeromicrobium stercorihominis phocae hippikon Actinobacillus Aeromicrobium Anaeromusa Atopobium Acholeplasma rossii erythreum Anaeromusa Atopobium fossor laidlawii Actinobacillus Aeromonas acidaminophila Atopobium Acholeplasma scotiae Aeromonas Anaeromyxobacter minutum modicum Actinobacillus allosaccharophila Anaeromyxobacter Atopobium Acholeplasma seminis Aeromonas dehalogenans parvulum morum Actinobacillus bestiarum Anaerorhabdus Atopobium rimae Acholeplasma succinogenes Aeromonas caviae Anaerorhabdus Atopobium vaginae multilocale Actinobaccillus Aeromonas furcosa Aureobacterium Acholeplasma suis encheleia Anaerosinus Aureobacterium oculi Actinobacillus Aeromonas Anaerosinus barkeri Acholeplasma ureae enteropelogenes glycerini Aurobacterium palmae Actinobaculum Aeromonas Anaerovirgula Aurobacterium Acholeplasma Actinobaculum eucrenophila Anaerovirgula liquefaciens parvum massiliense Aeromonas multivorans Avibacterium Acholeplasma Actinobaculum ichthiosmia Ancalomicrobium Avibacterium avium pleciae schaalii Aeromonas Ancalomicrobium Avibacterium Acholeplasma Actinobaculum jandaei adetum gallinarum vituli suis Aeromonas media Ancylobacter Avibacterium Achromobacter Actinomyces Aeromonas Ancylobacter paragallinarum Achromobacter urinale popoffii aquaticus Avibacterium denitrificans Actinocatenispora Aeromonas sobria Aneurinibacillus volantium Achromobacter Actinocatenispora Aeromonas veronii Aneurinibacillus Azoarcus insolitus rupis Agrobacterium aneurinilyticus Azoarcus indigens Achromobacter Actinocatenispora Agrobacterium Aneurinibacillus Azoarcus piechaudii thailandica gelatinovorum migulanus tolulyticus Achromobacter Actinocatenispora Agrococcus Aneurinibacillus Azoarcus ruhlandii sera Agrococcus thermoaerophilus toluvorans Achromobacter Actinocorallia citreus Angiococcus Azohydromonas spanius Actinocorallia Agrococcus Angiococcus Azohydromonas Acidaminobacter aurantiaca jenensis disciformis australica Acidaminobacter Actinocorallia Agromonas Angulomicrobium Azohydromonas hydrogenoformans aurea Agromonas Angulomicrobium lata Acidaminococcus Actinocorallia oligotrophica tetraedrale Azomonas Acidaminococcus cavernae Agromyces Anoxybacillus Azomonas agilis fermentans Actinocorallia Agromyces Anoxybacillus Azomonas insignis Acidaminococcus glomerata fucosus pushchinoensis Azomonas intestini Actinocorallia Agromyces Aquabacterium macrocytogenes Acidicaldus herbida hippuratus Aquabacterium Azorhizobium Acidicaldus Actinocorallia Agromyces commune Azorhizobium organivorans libanotica luteolus Aquabacterium caulinodans Acidimicrobium Actinocorallia Agromyces parvum Azorhizophilus Acidimicrobium longicatena mediolanus Azorhizophilus ferrooxidans Actinomadura Agromyces paspali Acidiphilium Actinomadura alba ramosus Azospirillum Acidiphilium Actinomadura Agromyces Azospirillum acidophilum atramentaria rhizospherae brasilense Acidiphilium Actinomadura Akkermansia Azospirillum angustum bangladeshensis Akkermansia halopraeferens Acidiphilium Actinomadura muciniphila Azospirillum cryptum catellatispora Albidiferax irakense Acidiphilium Actinomadura Albidiferax Azotobacter multivorum chibensis ferrireducens Azotobacter Acidiphilium Actinomadura Albidovulum beijerinckii organovorum chokoriensis Albidovulum Azotobacter Acidiphilium Actinomadura inexpectatum chroococcum rubrum citrea Alcaligenes Azotobacter Acidisoma Actinomadura Alcaligenes nigricans Acidisoma coerulea denitrificans Azotobacter sibiricum Actinomadura Alcaligenes salinestris Acidisoma tundrae echinospora faecalis Azotobacter Acidisphaera Actinomadura Alcanivorax vinelandii Acidisphaera fibrosa Alcanivorax rubrifaciens Actinomadura borkumensis Acidithiobacillus formosensis Alcanivorax Acidithiobacillus Actinomadura jadensis albertensis hibisca Algicola Acidithiobacillus Actinomadura Algicola caldus kijaniata bacteriolytica Acidithiobacillus Actinomadura Alicyclobacillus ferrooxidans latina Alicyclobacillus Acidithiobacillus Actinomadura disulfidooxidans thiooxidans livida Alicyclobacillus Acidobacterium Actinomadura sendaiensis Acidobacterium luteofluorescens Alicyclobacillus capsulatum Actinomadura vulcanalis macra Alishewanella Actinomadura Alishewanella madurae fetalis Actinomadura Alkalibacillus oligospora Alkalibacillus Actinomadura haloalkaliphilus pelletieri Actinomadura rubrobrunea Actinomadura rugatobispora Actinomadura umbrina Actinomadura verrucosospora Actinomadura vinacea Actinomadura viridilutea Actinomadura viridis Actinomadura yumaensis Bacillus Bacteroides Bibersteinia Borrelia Brevinema [see below] Bacteroides Bibersteinia trehalosi Borrelia afzelii Brevinema Bacteriovorax caccae Bifidobacterium Borrelia americana andersonii Bacteriovorax Bacteroides Bifidobacterium Borrelia Brevundimonas stolpii coagulans adolescentis burgdorferi Brevundimonas Bacteroides Bifidobacterium Borrelia alba eggerthii angulatum carolinensis Brevundimonas Bacteroides Bifidobacterium Borrelia coriaceae aurantiaca fragilis animalis Borrelia garinii Brevundimonas Bacteroides Bifidobacterium Borrelia japonica diminuta galacturonicus asteroides Bosea Brevundimonas Bacteroides Bifidobacterium Bosea intermedia helcogenes bifidum minatitlanensis Brevundimonas Bacteroides Bifidobacterium boum Bosea thiooxidans subvibrioides ovatus Bifidobacterium breve Brachybacterium Brevundimonas Bacteroides Bifidobacterium Brachybacterium vancanneytii pectinophilus catenulatum alimentarium Brevundimonas Bacteroides Bifidobacterium Brachybacterium variabilis pyogenes choerinum faecium Brevundimonas Bacteroides Bifidobacterium Brachybacterium vesicularis salyersiae coryneforme paraconglomeratum Brochothrix Bacteroides Bifidobacterium Brachybacterium Brochothrix stercoris cuniculi rhamnosum campestris Bacteroides suis Bifidobacterium Brachybacterium Brochothrix Bacteroides dentium tyrofermentans thermosphacta tectus Bifidobacterium Brachyspira Brucella Bacteroides gallicum Brachyspira Brucella canis thetaiotaomicron Bifidobacterium alvinipulli Brucella Bacteroides gallinarum Brachyspira neotomae uniformis Bifidobacterium hyodysenteriae Bryobacter Bacteroides indicum Brachyspira Bryobacter ureolyticus Bifidobacterium longum innocens aggregatus Bacteroides Bifidobacterium Brachyspira Burkholderia vulgatus magnumBifidobacterium murdochii Burkholderia Balnearium merycicum Brachyspira ambifaria Balnearium Bifidobacterium pilosicoli Burkholderia lithotrophicum minimum Bradyrhizobium andropogonis Balneatrix Bifidobacterium Bradyrhizobium Burkholderia Balneatrix alpica pseudocatenulatum canariense anthina Balneola Bifidobacterium Bradyrhizobium Burkholderia Balneola vulgaris pseudolongum elkanii caledonica Barnesiella Bifidobacterium Bradyrhizobium Burkholderia Barnesiella pullorum japonicum caryophylli viscericola Bifidobacterium Bradyrhizobium Burkholderia Bartonella ruminantium liaoningense cenocepacia Bartonella Bifidobacterium Brenneria Burkholderia alsatica saeculare Brenneria alni cepacia Bartonella Bifidobacterium subtile Brenneria Burkholderia bacilliformis Bifidobacterium nigrifluens cocovenenans Bartonella thermophilum Brenneria quercina Burkholderia clarridgeiae Bilophila Brenneria quercina dolosa Bartonella Bilophila wadsworthia Brenneria salicis Burkholderia doshiae Biostraticola Brevibacillus fungorum Bartonella Biostraticola tofi Brevibacillus agri Burkholderia elizabethae Bizionia Brevibacillus glathei Bartonella Bizionia argentinensis borstelensis Burkholderia grahamii Blastobacter Brevibacillus brevis glumae Bartonella Blastobacter capsulatus Brevibacillus Burkholderia henselae Blastobacter centrosporus graminis Bartonella denitrificans Brevibacillus Burkholderia rochalimae Blastococcus choshinensis kururiensis Bartonella Blastococcus Brevibacillus Burkholderia vinsonii aggregatus invocatus multivorans Bavariicoccus Blastococcus Brevibacillus Burkholderia Bavariicoccus saxobsidens laterosporus phenazinium seileri Blastochloris Brevibacillus Burkholderia Bdellovibrio Blastochloris parabrevis plantarii Bdellovibrio viridis Brevibacillus Burkholderia bacteriovorus Blastomonas reuszeri pyrrocinia Bdellovibrio Blastomonas Brevibacterium Burkholderia exovorus natatoria Brevibacterium silvatlantica Beggiatoa Blastopirellula abidum Burkholderia Beggiatoa alba Blastopirellula Brevibacterium stabilis Beijerinckia marina album Burkholderia Beijerinckia Blautia Brevibacterium thailandensis derxii Blautia coccoides aurantiacum Burkholderia Beijerinckia Blautia hansenii Brevibacterium tropica fluminensis Blautia producta celere Burkholderia Beijerinckia Blautia wexlerae Brevibacterium unamae indica Bogoriella epidermidis Burkholderia Beijerinckia Bogoriella Brevibacterium vietnamiensis mobilis caseilytica frigoritolerans Buttiauxella Belliella Bordetella Brevibacterium Buttiauxella Belliella baltica Bordetella avium halotolerans agrestis Bellilinea Bordetella Brevibacterium Buttiauxella Bellilinea bronchiseptica iodinum brennerae caldifistulae Bordetella hinzii Brevibacterium Buttiauxella Belnapia Bordetella holmesii linens ferragutiae Belnapia Bordetella parapertussis Brevibacterium Buttiauxella moabensis Bordetella pertussis lyticum gaviniae Bergeriella Bordetella petrii Brevibacterium Buttiauxella Bergeriella Bordetella trematum mcbrellneri izardii denitrificans Brevibacterium Buttiauxella Beutenbergia otitidis noackiae Beutenbergia Brevibacterium Buttiauxella cavernae oxydans warmboldiae Brevibacterium Butyrivibrio paucivorans Butyrivibrio Brevibacterium fibrisolvens stationis Butyrivibrio hungatei Butyrivibrio proteoclasticus Bacillus B. acidiceler B. aminovorans B. glucanolyticus B. taeanensis B. lautus B. acidicola B. amylolyticus B. gordonae B. tequilensis B. lehensis B. acidiproducens B. andreesenii B. gottheilii B. thermantarcticus B. lentimorbus B. acidocaldarius B. aneurinilyticus B. graminis B. thermoaerophilus B. lentus B. acidoterrestris B. anthracis B. halmapalus B. thermoamylovorans B. licheniformis B. aeolius B. aquimaris B. haloalkaliphilus B. thermocatenulatus B. ligniniphilus B. aerius B. arenosi B. halochares B. thermocloacae B. litoralis B. aerophilus B. arseniciselenatis B. halodenitrificans B. thermocopriae B. locisalis B. agaradhaerens B. arsenicus B. halodurans B. thermodenitrificans B. luciferensis B. agri B. aurantiacus B. halophilus B. thermoglucosidasius B. luteolus B. aidingensis B. arvi B. halosaccharovorans B. thermolactis B. luteus B. akibai B. aryabhattai B. hemicellulosilyticus B. thermoleovorans B. macauensis B. alcalophilus B. asahii B. hemicentroti B. thermophilus B. macerans B. algicola B. atrophaeus B. herbersteinensis B. thermoruber B. macquariensis B. alginolyticus B. axarquiensis B. horikoshii B. thermosphaericus B. macyae B. alkalidiazotrophicus B. azotofixans B. horneckiae B. thiaminolyticus B. malacitensis B. alkalinitrilicus B. azotoformans B. horti B. thioparans B. mannanilyticus B. alkalisediminis B. badius B. huizhouensis B. thuringiensis B. marisflavi B. alkalitelluris B. barbaricus B. humi B. tianshenii B. marismortui B. altitudinis B. bataviensis B. hwajinpoensis B. trypoxylicola B. marmarensis B. alveayuensis B. beijingensis B. idriensis B. tusciae B. massiliensis B. alvei B. benzoevorans B. indicus B. validus B. megaterium B. amyloliquefaciens B. beringensis B. infantis B. vallismortis B. mesonae B.a. subsp. amyloliquefaciens B. berkeleyi B. infernus B. vedderi B. methanolicus B.a. subsp. plantarum B. beveridgei B. insolitus B. velezensis B. methylotrophicus B. dipsosauri B. bogoriensis B. invictae B. vietnamensis B. migulanus B. drentensis B. boroniphilus B. iranensis B. vireti B. mojavensis B. edaphicus B. borstelensis B. isabeliae B. vulcani B. mucilaginosus B. ehimensis B. brevis Migula B. isronensis B. wakoensis B. muralis B. eiseniae B. butanolivorans B. jeotgali B. weihenstephanensis B. murimartini B. enclensis B. canaveralius B. kaustophilus B. xiamenensis B. mycoides B. endophyticus B. carboniphilus B. kobensis B. xiaoxiensis B. naganoensis B. endoradicis B. cecembensis B. kochii B. zhanjiangensis B. nanhaiensis B. farraginis B. cellulosilyticus B. kokeshiiformis B. peoriae B. nanhaiisediminis B. fastidiosus B. centrosporus B. koreensis B. persepolensis B. nealsonii B. fengqiuensis B. cereus B. korlensis B. persicus B. neidei B. firmus B. chagannorensis B. kribbensis B. pervagus B. neizhouensis B. flexus B. chitinolyticus B. krulwichiae B. plakortidis B. niabensis B. foraminis B. chondroitinus B. laevolacticus B. pocheonensis B. niacini B. fordii B. choshinensis B. larvae B. polygoni B. novalis B. formosus B. chungangensis B. laterosporus B. polymyxa B. oceanisediminis B. fortis B. cibi B. salexigens B. popilliae B. odysseyi B. fumarioli B. circulans B. saliphilus B. pseudalcalophilus B. okhensis B. funiculus B. clarkii B. schlegelii B. pseudofirmus B. okuhidensis B. fusiformis B. clausii B. sediminis B. pseudomycoides B. oleronius B. galactophilus B. coagulans B. selenatarsenatis B. psychrodurans B. oryzaecorticis B. galactosidilyticus B. coahuilensis B. selenitireducens B. psychrophilus B. oshimensis B. galliciensis B. cohnii B. seohaeanensis B. psychrosaccharolyticus B. pabuli B. gelatini B. composti B. shacheensis B. psychrotolerans B. pakistanensis B. gibsonii B. curdlanolyticus B. shackletonii B. pulvifaciens B. pallidus B. ginsengi B. cycloheptanicus B. siamensis B. pumilus B. pallidus B. ginsengihumi B. cytotoxicus B. silvestris B. purgationiresistens B. panacisoli B. ginsengisoli B. daliensis B. simplex B. pycnus B. panaciterrae B. globisporus B. decisifrondis B. siralis B. qingdaonensis B. pantothenticus (eg, B.g. subsp. B. decolorationis B. smithii B. qingshengii B. parabrevis Globisporus; B. deserti B. soli B. reuszeri B. paraflexus or B.g. B. solimangrovi B. rhizosphaerae B. pasteurii subsp. Marinus) B. solisalsi B. rigui B. patagoniensis B. songklensis B. ruris B. sonorensis B. safensis B. sphaericus B. salarius B. sporothermodurans B. stearothermophilus B. stratosphericus B. subterraneus B. subtilis (eg, B.s. subsp. Inaquosorum; or B.s. subsp. Spizizeni; or B.s. subsp. Subtilis) Caenimonas Campylobacter Cardiobacterium Catenuloplanes Curtobacterium Caenimonas koreensis Campylobacter coli Cardiobacterium Catenuloplanes Curtobacterium Caldalkalibacillus Campylobacter hominis atrovinosus albidum Caldalkalibacillus concisus Carnimonas Catenuloplanes Curtobacterium uzonensis Campylobacter Carnimonas castaneus citreus Caldanaerobacter curvus nigrificans Catenuloplanes Caldanaerobacter Campylobacter fetus Carnobacterium crispus subterraneus Campylobacter Carnobacterium Catenuloplanes Caldanaerobius gracilis alterfunditum indicus Caldanaerobius Campylobacter Carnobacterium Catenuloplanes fijiensis helveticus divergens japonicus Caldanaerobius Campylobacter Carnobacterium Catenuloplanes polysaccharolyticus hominis funditum nepalensis Caldanaerobius zeae Campylobacter Carnobacterium Catenuloplanes Caldanaerovirga hyointestinalis gallinarum niger Caldanaerovirga Campylobacter Carnobacterium Chryseobacterium acetigignens jejuni maltaromaticum Chryseobacterium Caldicellulosiruptor Campylobacter lari Carnobacterium balustinum Caldicellulosiruptor Campylobacter mobile Citrobacter bescii mucosalis Carnobacterium C. amalonaticus Caldicellulosiruptor Campylobacter viridans C. braakii kristjanssonii rectus Caryophanon C. diversus Caldicellulosiruptor Campylobacter Caryophanon C. farmeri owensensis showae latum C. freundii Campylobacter Caryophanon C. gillenii sputorum tenue C. koseri Campylobacter Catellatospora C. murliniae upsaliensis Catellatospora C. pasteurii ^([1]) Capnocytophaga citrea C. rodentium Capnocytophaga Catellatospora C. sedlakii canimorsus methionotrophica C. werkmanii Capnocytophaga Catenococcus C. youngae cynodegmi Catenococcus Clostridium Capnocytophaga thiocycli (see below) gingivalis Coccochloris Capnocytophaga Coccochloris granulosa elabens Capnocytophaga Corynebacterium haemolytica Corynebacterium Capnocytophaga flavescens ochracea Corynebacterium Capnocytophaga variabile sputigena Clostridium Clostridium absonum, Clostridium aceticum, Clostridium acetireducens, Clostridium acetobutylicum, Clostridium acidisoli, Clostridium aciditolerans, Clostridium acidurici, Clostridium aerotolerans, Clostridium aestuarii, Clostridium akagii, Clostridium aldenense, Clostridium aldrichii, Clostridium algidicarni, Clostridium algidixylanolyticum, Clostridium algifaecis, Clostridium algoriphilum, Clostridium alkalicellulosi, Clostridium aminophilum, Clostridium aminovalericum, Clostridium amygdalinum, Clostridium amylolyticum, Clostridium arbusti, Clostridium arcticum, Clostridium argentinense, Clostridium asparagiforme, Clostridium aurantibutyricum, Clostridium autoethanogenum, Clostridium baratii, Clostridium barkeri, Clostridium bartlettii, Clostridium beijerinckii, Clostridium bifermentans, Clostridium bolteae, Clostridium bornimense, Clostridium botulinum, Clostridium bowmanii, Clostridium bryantii, Clostridium butyricum, Clostridium cadaveris, Clostridium caenicola, Clostridium caminithermale, Clostridium carboxidivorans, Clostridium carnis, Clostridium cavendishii, Clostridium celatum, Clostridium celerecrescens, Clostridium cellobioparum, Clostridium cellulofermentans, Clostridium cellulolyticum, Clostridium cellulosi, Clostridium cellulovorans, Clostridium chartatabidum, Clostridium chauvoei, Clostridium chromiireducens, Clostridium citroniae, Clostridium clariflavum, Clostridium clostridioforme, Clostridium coccoides, Clostridium cochlearium, Clostridium colletant, Clostridium colicanis, Clostridium colinum, Clostridium collagenovorans, Clostridium cylindrosporum, Clostridium difficile, Clostridium diolis, Clostridium disporicum, Clostridium drakei, Clostridium durum, Clostridium estertheticum, Clostridium estertheticum estertheticum, Clostridium estertheticum laramiense, Clostridium fallax, Clostridium felsineum, Clostridium fervidum, Clostridium fimetarium, Clostridium formicaceticum, Clostridium frigidicarnis, Clostridium frigoris, Clostridium ganghwense, Clostridium gasigenes, Clostridium ghonii, Clostridium glycolicum, Clostridium glycyrrhizinilyticum, Clostridium grantii, Clostridium haemolyticum, Clostridium halophilum, Clostridium hastiforme, Clostridium hathewayi, Clostridium herbivorans, Clostridium hiranonis, Clostridium histolyticum, Clostridium homopropionicum, Clostridium huakuii, Clostridium hungatei, Clostridium hydrogeniformans, Clostridium hydroxybenzoicum, Clostridium hylemonae, Clostridium jejuense, Clostridium indolis, Clostridium innocuum, Clostridium intestinale, Clostridium irregulare, Clostridium isatidis, Clostridium josui, Clostridium kluyveri, Clostridium lactatifermentans, Clostridium lacusfryxellense, Clostridium laramiense, Clostridium lavalense, Clostridium lentocellum, Clostridium lentoputrescens, Clostridium leptum, Clostridium limosum, Clostridium litorale, Clostridium lituseburense, Clostridium ljungdahlii, Clostridium lortetii, Clostridium lundense, Clostridium magnum, Clostridium malenominatum, Clostridium mangenotii, Clostridium mayombei, Clostridium methoxybenzovorans, Clostridium methylpentosum, Clostridium neopropionicum, Clostridium nexile, Clostridium nitrophenolicum, Clostridium novyi, Clostridium oceanicum, Clostridium orbiscindens, Clostridium oroticum, Clostridium oxalicum, Clostridium papyrosolvens, Clostridium paradoxum, Clostridium paraperfringens (Alias: C. welchii), Clostridium paraputrificum, Clostridium pascui, Clostridium pasteurianum, Clostridium peptidivorans, Clostridium perenne, Clostridium perfringens, Clostridium pfennigii, Clostridium phytofermentans, Clostridium piliforme, Clostridium polysaccharolyticum, Clostridium populeti, Clostridium propionicum, Clostridium proteoclasticum, Clostridium proteolyticum, Clostridium psychrophilum, Clostridium puniceum, Clostridium purinilyticum, Clostridium putrefaciens, Clostridium putrificum, Clostridium quercicolum, Clostridium quinii, Clostridium ramosum, Clostridium rectum, Clostridium roseum, Clostridium saccharobutylicum, Clostridium saccharogumia, Clostridium saccharolyticum, Clostridium saccharoperbutylacetonicum, Clostridium sardiniense, Clostridium sartagoforme, Clostridium scatologenes, Clostridium schirmacherense, Clostridium scindens, Clostridium septicum, Clostridium sordellii, Clostridium sphenoides, Clostridium spiroforme, Clostridium sporogenes, Clostridium sporosphaeroides, Clostridium stercorarium, Clostridium stercorarium leptospartum, Clostridium stercorarium stercorarium, Clostridium stercorarium thermolacticum, Clostridium sticklandii, Clostridium straminisolvens, Clostridium subterminale, Clostridium sufflavum, Clostridium sulfidigenes, Clostridium symbiosum, Clostridium tagluense, Clostridium tepidiprofundi, Clostridium termitidis, Clostridium tertium, Clostridium tetani, Clostridium tetanomorphum, Clostridium thermaceticum, Clostridium thermautotrophicum, Clostridium thermoalcaliphilum, Clostridium thermobutyricum, Clostridium thermocellum, Clostridium thermocopriae, Clostridium thermohydrosulfuricum, Clostridium thermolacticum, Clostridium thermopalmarium, Clostridium thermopapyrolyticum, Clostridium thermosaccharolyticum, Clostridium thermosuccinogenes, Clostridium thermosulfurigenes, Clostridium thiosulfatireducens, Clostridium tyrobutyricum, Clostridium uliginosum, Clostridium ultunense, Clostridium villosum, Clostridium vincentii, Clostridium viride, Clostridium xylanolyticum, Clostridium xylanovorans Dactylosporangium Deinococcus Delftia Echinicola Dactylosporangium Deinococcus Delftia Echinicola aurantiacum aerius acidovorans pacifica Dactylosporangium Deinococcus Desulfovibrio Echinicola fulvum apachensis Desulfovibrio vietnamensis Dactylosporangium Deinococcus desulfuricans matsuzakiense aquaticus Diplococcus Dactylosporangium Deinococcus Diplococcus roseum aquatilis pneumoniae Dactylosporangium Deinococcus caeni thailandense Deinococcus Dactylosporangium radiodurans vinaceum Deinococcus radiophilus Enterobacter Enterobacter kobei Faecalibacterium Flavobacterium E. aerogenes E. ludwigii Faecalibacterium Flavobacterium E. amnigenus E. mori prausnitzii antarcticum E. agglomerans E. nimipressuralis Fangia Flavobacterium E. arachidis E. oryzae Fangia aquatile E. asburiae E. pulveris hongkongensis Flavobacterium E. cancerogenous E. pyrinus Fastidiosipila aquidurense E. cloacae E. radicincitans Fastidiosipila Flavobacterium E. cowanii E. taylorae sanguinis balustinum E. dissolvens E. turicensis Fusobacterium Flavobacterium E. gergoviae E. sakazakii Fusobacterium croceum E. helveticus Enterobacter soli nucleatum Flavobacterium E. hormaechei Enterococcus cucumis E. intermedius Enterococcus Flavobacterium durans daejeonense Enterococcus Flavobacterium faecalis defluvii Enterococcus Flavobacterium faecium degerlachei Erwinia Flavobacterium Erwinia hapontici denitrificans Escherichia Flavobacterium Escherichia coli filum Flavobacterium flevense Flavobacterium frigidarium Flavobacterium mizutaii Flavobacterium okeanokoites Gaetbulibacter Haemophilus Ideonella Janibacter Gaetbulibacter Haemophilus Ideonella Janibacter saemankumensis aegyptius azotifigens anophelis Gallibacterium Haemophilus Idiomarina Janibacter Gallibacterium anatis aphrophilus Idiomarina corallicola Gallicola Haemophilus felis abyssalis Janibacter Gallicola barnesae Haemophilus Idiomarina limosus Garciella gallinariim baltica Janibacter Garciella Haemophilus Idiomarina melonis nitratireducens haemolyticus fontislapidosi Janibacter Geobacillus Haemophilus Idiomarina terrae Geobacillus influenzae loihiensis Jannaschia thermoglucosidasius Haemophilus Idiomarina Jannaschia Geobacillus paracuniculus ramblicola cystaugens stearothermophilus Haemophilus Idiomarina Jannaschia Geobacter parahaemolyticus seosinensis helgolandensis Geobacter Haemophilus Idiomarina Jannaschia bemidjiensis parainfluenzae zobellii pohangensis Geobacter brememis Haemophilus Ignatzschineria Jannaschia Geobacter chapellei paraphrohaemolyticus Ignatzschineria rubra Geobacter grbiciae Haemophilus larvae Janthinobacterium Geobacter parasuis Ignavigranum Janthinobacterium hydrogenophilus Haemophilus Ignavigranum agaricidamnosum Geobacter lovleyi pittmaniae ruoffiae Janthinobacterium Geobacter Hafnia Ilumatobacter lividum metallireducens Hafnia alvei Ilumatobacter Jejuia Geobacter pelophilus Hahella fluminis Jejuia Geobacter pickeringii Hahella Ilyobacter pallidilutea Geobacter ganghwensis Ilyobacter Jeotgalibacillus sulfurreducens Halalkalibacillus delafieldii Jeotgalibacillus Geodermatophilus Halalkalibacillus Ilyobacter alimentarius Geodermatophilus halophilus insuetus Jeotgalicoccus obscurus Helicobacter Ilyobacter Jeotgalicoccus Gluconacetobacter Helicobacter polytropus halotolerans Gluconacetobacter pylori Ilyobacter xylinus tartaricus Gordonia Gordonia rubripertincta Kaistia Labedella Listeria ivanovii Micrococcus Nesterenkonia Kaistia adipata Labedella L. marthii Micrococcus Nesterenkonia Kaistia soli gwakjiensis L. monocytogenes luteus holobia Kangiella Labrenzia L. newyorkensis Micrococcus Nocardia Kangiella Labrenzia L. riparia lylae Nocardia aquimarina aggregata L. rocourtiae Moraxella argentinensis Kangiella koreensis Labrenzia alba L. seeligeri Moraxella bovis Nocardia Kerstersia Labrenzia L. weihenstephanensis Moraxella corallina Kerstersia gyiorum alexandrii L. welshimeri nonliquefaciens Nocardia Kiloniella Labrenzia marina Listonella Moraxella otitidiscaviarum Kiloniella laminariae Labrys Listonella osloensis Klebsiella Labrys anguillarum Nakamurella K. granulomatis methylaminiphilus Macrococcus Nakamurella K. oxytoca Labrys Macrococcus multipartita K. pneumoniae miyagiensis bovicus Nannocystis K. terrigena Labrys monachus Marinobacter Nannocystis K. variicola Labrys Marinobacter pusilla Kluyvera okinawensis algicola Natranaerobius Kluyvera ascorbata Labrys Marinobacter Natranaerobius Kocuria portucalensis bryozoorum thermophilus Kocuria roasea Lactobacillus Marinobacter Natranaerobius Kocuria varians [see below] flavimaris trueperi Kurthia Laceyella Meiothermus Naxibacter Kurthia zopfii Laceyella putida Meiothermus Naxibacter Lechevalieria ruber alkalitolerans Lechevalieria Methylophilus Neisseria aerocolonigenes Methylophilus Neisseria cinerea Legionella methylotrophus Neisseria [see below] Microbacterium denitrificans Listeria Microbacterium Neisseria L. aquatica ammoniaphilum gonorrhoeae L. booriae Microbacterium Neisseria L. cornellensis arborescens lactamica L. fleischmannii Microbacterium Neisseria mucosa L. floridensis liquefaciens Neisseria sicca L. grandensis Microbacterium Neisseria subflava L. grayi oxydans Neptunomonas L. innocua Neptunomonas japonica Lactobacillus L. acetotolerans L. catenaformis L. mali L. parakefiri L. sakei L. acidifarinae L. ceti L. manihotivorans L. paralimentarius L. salivarius L. acidipiscis L. coleohominis L. mindensis L. paraplantarum L. sanfranciscensis L. acidophilus L. collinoides L. mucosae L. pentosus L. satsumensis Lactobacillus agilis L. composti L. murinus L. perolens L. secaliphilus L. algidus L. concavus L. nagelii L. plantarum L. sharpeae L. alimentarius L. coryniformis L. namurensis L. pontis L. siliginis L. amylolyticus L. crispatus L. nantensis L. protectus L. spicheri L. amylophilus L. crustorum L. oligofermentans L. psittaci L. suebicus L. amylotrophicus L. curvatus L. oris L. rennini L. thailandensis L. amylovorus L. delbrueckii L. panis L. reuteri L. ultunensis L. animalis subsp. bulgaricus L. pantheris L. rhamnosus L. vaccinostercus L. antri L. delbrueckii L. parabrevis L. rimae L. vaginalis L. apodemi subsp. delbrueckii L. parabuchneri L. rogosae L. versmoldensis L. aviarius L. delbrueckii L. paracasei L. rossiae L. vini L. bifermentans subsp. lactis L. paracollinoides L. ruminis L. vitulinus L. brevis L. dextrinicus L. parafarraginis L. saerimneri L. zeae L. buchneri L. diolivorans L. homohiochii L. jensenii L. zymae L. camelliae L. equi L. iners L. johnsonii L. gastricus L. casei L. equigenerosi L. ingluviei L. kalixensis L. ghanensis L. kitasatonis L. farraginis L. intestinalis L. kefiranofaciens L. graminis L. kunkeei L. farciminis L. fuchuensis L. kefiri L. hammesii L. leichmannii L. fermentum L. gallinarum L. kimchii L. hamsteri L. lindneri L. fornicalis L. gasseri L. helveticus L. harbinensis L. malefermentans L. fructivorans L. hilgardii L. hayakitensis L. frumenti Legionella Legionella Legionella Candidatus Legionella Legionella adelaidensis drancourtii jeonii quinlivanii Legionella anisa Legionella Legionella Legionella Legionella dresdenensis jordanis rowbothamii beliardensis Legionella Legionella Legionella Legionella drozanskii lansingensis rubrilucens birminghamensis Legionella Legionella Legionella Legionella dumoffii londiniensis sainthelensi bozemanae Legionella erythra Legionella Legionella Legionella brunensis Legionella longbeachae santicrucis Legionella fairfieldensis Legionella lytica Legionella busanensis Legionella fallonii Legionella shakespearei Legionella cardiaca Legionella feeleii maceachernii Legionella Legionella cherrii Legionella Legionella spiritensis Legionella geestiana massiliensis Legionella cincinnatiensis Legionella Legionella steelei Legionella genomospecies micdadei Legionella clemsonensis Legionella Legionella steigerwaltii Legionella gormanii monrovica Legionella donaldsonii Legionella Legionella taurinensis gratiana moravica Legionella Legionella Legionella tucsonensis gresilensis nagasakiensis Legionella Legionella Legionella tunisiensis hackeliae nautarum Legionella Legionella Legionella wadsworthii impletisoli norrlandica Legionella Legionella Legionella waltersii israelensis oakridgensis Legionella Legionella Legionella worsleiensis jamestowniensis parisiensis Legionella Legionella yabuuchiae pittsburghensis Legionella pneumophila Legionella quateirensis Oceanibulbus Paenibacillus Prevotella Quadrisphaera Oceanibulbus Paenibacillus Prevotella Quadrisphaera indolifex thiaminolyticus albensis granulorum Oceanicaulis Pantoea Prevotella amnii Quatrionicoccus Oceanicaulis Pantoea Prevotella Quatrionicoccus alexandrii agglomerans bergensis australiensis Oceanicola Paracoccus Prevotella bivia Quinella Oceanicola batsensis Paracoccus Prevotella brevis Quinella ovalis Oceanicola alcaliphilus Prevotella Ralstonia granulosus Paucimonas bryantii Ralstonia Oceanicola Paucimonas Prevotella buccae eutropha nanhaiensis lemoignei Prevotella Ralstonia Oceanimonas Pectobacterium buccalis insidiosa Oceanimonas Pectobacterium Prevotella copri Ralstonia baumannii aroidearum Prevotella mannitolilytica Oceaniserpentilla Pectobacterium dentalis Ralstonia Oceaniserpentilla atrosepticum Prevotella pickettii haliotis Pectobacterium denticola Ralstonia Oceanisphaera betavasculorum Prevotella disiens pseudosolanacearum Oceanisphaera Pectobacterium Prevotella Ralstonia syzygii donghaensis cacticida histicola Ralstonia Oceanisphaera Pectobacterium Prevotella solanacearum litoralis carnegieana intermedia Ramlibacter Oceanithermus Pectobacterium Prevotella Ramlibacter Oceanithermus carotovorum maculosa henchirensis desulfurans Pectobacterium Prevotella Ramlibacter Oceanithermus chrysanthemi marshii tataouinensis profundus Pectobacterium Prevotella Raoultella Oceanobacillus cypripedii melaninogenica Raoultella Oceanobacillus caeni Pectobacterium Prevotella micans ornithinolytica Oceanospirillum rhapontici Prevotella Raoultella Oceanospirillum Pectobacterium multiformis planticola linum wasabiae Prevotella Raoultella Planococcus nigrescens terrigena Planococcus Prevotella oralis Rathayibacter citreus Prevotella oris Rathayibacter Planomicrobium Prevotella caricis Planomicrobium oulorum Rathayibacter okeanokoites Prevotella pallens festucae Plesiomonas Prevotella salivae Rathayibacter Plesiomonas Prevotella iranicus shigelloides stercorea Rathayibacter Proteus Prevotella rathayi Proteus vulgaris tannerae Rathayibacter Prevotella toxicus timonensis Rathayibacter Prevotella tritici veroralis Rhodobacter Providencia Rhodobacter Providencia sphaeroides stuartii Ruegeria Pseudomonas Ruegeria Pseudomonas gelatinovorans aeruginosa Pseudomonas alcaligenes Pseudomonas anguillispetica Pseudomonas fluorescens Pseudoalteromonas haloplanktis Pseudomonas mendocina Pseudomonas pseudoalcaligenes Pseudomonas putida Pseudomonas tutzeri Pseudomonas syringae Psychrobacter Psychrobacter faecalis Psychrobacter phenylpyruvicus Saccharococcus Sagittula Sanguibacter Stenotrophomonas Tatlockia Saccharococcus Sagittula stellata Sanguibacter Stenotrophomonas Tatlockia thermophilus Salegentibacter keddieii maltophilia maceachernii Saccharomonospora Salegentibacter Sanguibacter Streptococcus Tatlockia Saccharomonospora salegens suarezii [also see below] micdadei azurea Salimicrobium Saprospira Streptomyces Tenacibaculum Saccharomonospora Salimicrobium Saprospira Streptomyces Tenacibaculum cyanea album grandis achromogenes amylolyticum Saccharomonospora Salinibacter Sarcina Streptomyces Tenacibaculum viridis Salinibacter ruber Sarcina maxima cesalbus discolor Saccharophagus Salinicoccus Sarcina ventriculi Streptomyces Tenacibaculum Saccharophagus Salinicoccus Sebaldella cescaepitosus gallaicum degradans alkaliphilus Sebaldella Streptomyces Tenacibaculum Saccharopolyspora Salinicoccus termitidis cesdiastaticus lutimaris Saccharopolyspora hispanicus Serratia Streptomyces Tenacibaculum erythraea Salinicoccus roseus Serratia fonticola cesexfoliatus mesophilum Saccharopolyspora Salinispora Serratia Streptomyces Tenacibaculum gregorii Salinispora marcescens fimbriatus skagerrakense Saccharopolyspora arenicola Sphaerotilus Streptomyces Tepidanaerobacter hirsuta Salinispora tropica Sphaerotilus fradiae Tepidanaerobacter Saccharopolyspora Salinivibrio natans Streptomyces syntrophicus hordei Salinivibrio Sphingobacterium fulvissimus Tepidibacter Saccharopolyspora costicola Sphingobacterium Streptomyces Tepidibacter rectivirgula Salmonella multivorum griseoruber formicigenes Saccharopolyspora Salmonella bongori Staphylococcus Streptomyces Tepidibacter spinosa Salmonella enterica [see below] griseus thalassicus Saccharopolyspora Salmonella Streptomyces Thermus taberi subterranea lavendulae Thermus Saccharothrix Salmonella typhi Streptomyces aquaticus Saccharothrix phaeochromogenes Thermus australiensis Streptomyces filiformis Saccharothrix thermodiastaticus Thermus coeruleofusca Streptomyces thermophilus Saccharothrix tubercidicus espanaensis Saccharothrix longispora Saccharothrix mutabilis Saccharothrix syringae Saccharothrix tangerinus Saccharothrix texasensis Staphylococcus S. arlettae S. equorum S. microti S. schleiferi S. agnetis S. felis S. muscae S. sciuri S. aureus S. fleurettii S. nepalensis S. simiae S. auricularis S. gallinarum S. pasteuri S. simulans S. capitis S. haemolyticus S. petrasii S. stepanovicii S. caprae S. hominis S. pettenkoferi S. succinus S. carnosus S. hyicus S. piscifermentans S. vitulinus S. caseolyticus S. intermedius S. pseudintermedius S. warneri S. chromogenes S. kloosii S. pseudolugdunensis S. xylosus S. cohnii S. leei S. pulvereri S. condimenti S. lentus S. rostri S. delphini S. lugdunensis S. saccharolyticus S. devriesei S. lutrae S. saprophyticus S. epidermidis S. lyticans S. massiliensis Streptococcus Streptococcus Streptococcus Streptococcus Streptococcus agalactiae infantarius orisratti thermophilus Streptococcus anginosus Streptococcus iniae Streptococcus Streptococcus Streptococcus bovis Streptococcus parasanguinis sanguinis Streptococcus canis intermedius Streptococcus Streptococcus Streptococcus Streptococcus peroris sobrinus constellatus lactarius Streptococcus Streptococcus Streptococcus downei Streptococcus pneumoniae suis Streptococcus milleri Streptococcus Streptococcus dysgalactiae Streptococcus mitis pseudopneumoniae uberis Streptococcus equines Streptococcus Streptococcus Streptococcus Streptococcus faecalis mutans pyogenes vestibularis Streptococcus ferus Streptococcus oralis Streptococcus Streptococcus Streptococcus ratti viridans tigurinus Streptococcus Streptococcus salivariu zooepidemicus Uliginosibacterium Vagococcus Vibrio Virgibacillus Xanthobacter Uliginosibacterium Vagococcus Vibrio aerogenes Virgibacillus Xanthobacter gangwonense carniphilus Vibrio halodenitrificans agilis Ulvibacter Vagococcus aestuarianus Virgibacillus Xanthobacter Ulvibacter litoralis elongatus Vibrio albensis pantothenticus aminoxidans Umezawaea Vagococcus fessus Vibrio Weissella Xanthobacter Umezawaea tangerina Vagococcus fluvialis alginolyticus Weissella cibaria autotrophicus Undibacterium Vagococcus lutrae Vibrio campbellii Weissella confusa Xanthobacter Undibacterium pigrum Vagococcus Vibrio cholerae Weissella flavus Ureaplasma salmoninarum Vibrio halotolerans Xanthobacter Ureaplasma Variovorax cincinnatiensis Weissella tagetidis urealyticum Variovorax Vibrio hellenica Xanthobacter Ureibacillus boronicumulans coralliilyticus Weissella viscosus Ureibacillus composti Variovorax Vibrio kandleri Xanthomonas Ureibacillus dokdonensis cyclitrophicus Weissella Xanthomonas suwonensis Variovorax Vibrio koreensis albilineans Ureibacillus terrenus paradoxus diazotrophicus Weissella minor Xanthomonas Ureibacillus Variovorax soli Vibrio fluvialis Weissella alfalfae thermophilus Veillonella Vibrio furnissii paramesenteroides Xanthomonas Ureibacillus Veillonella atypica Vibrio gazogenes Weissella soli arboricola thermosphaericus Veillonella caviae Vibrio halioticoli Weissella Xanthomonas Veillonella criceti Vibrio harveyi thailandensis axonopodis Veillonella dispar Vibrio Weissella Xanthomonas Veillonella ichthyoenteri viridescens campestris montpellierensis Vibrio Williamsia Xanthomonas Veillonella parvula mediterranei Williamsia citri Veillonella ratti Vibrio marianensis Xanthomonas Veillonella metschnikovii Williamsia maris codiaei rodentium Vibrio mytili Williamsia Xanthomonas Venenivibrio Vibrio natriegens serinedens cucurbitae Venenivibrio Vibrio Winogradskyella Xanthomonas stagnispumantis navarrensis Winogradskyella euvesicatoria Verminephrobacter Vibrio nereis thalassocola Xanthomonas Verminephrobacter Vibrio Wolbachia fragariae eiseniae nigripulchritudo Wolbachia Xanthomonas Verrucomicrobium Vibrio ordalii persica fuscans Verrucomicrobium Vibrio orientalis Wolinella Xanthomonas spinosum Vibrio Wolinella gardneri parahaemolyticus succinogenes Xanthomonas Vibrio pectenicida Zobellia hortorum Vibrio penaeicida Zobellia Xanthomonas Vibrio galactanivorans hyacinthi proteolyticus Zobellia uliginosa Xanthomonas Vibrio shilonii Zoogloea perforans Vibrio splendidus Zoogloea Xanthomonas Vibrio tubiashii ramigera phaseoli Vibrio vulnificus Zoogloea Xanthomonas resiniphila pisi Xanthomonas populi Xanthomonas theicola Xanthomonas translucens Xanthomonas vesicatoria Xylella Xylella fastidiosa Xylophilus Xylophilus ampelinus Xenophilus Yangia Yersinia Zooshikella Zobellella Xenophilus azovorans Yangia pacifica mollaretii Zooshikella Zobellella Xenorhabdus Yaniella Yersinia ganghwensis denitrificans Xenorhabdus beddingii Yaniella flava philomiragia Zunongwangia Zobellella Xenorhabdus bovienii Yaniella Yersinia pestis Zunongwangia taiwanensis Xenorhabdus halotolerans Yersinia profunda Zeaxanthinibacter cabanillasii Yeosuana pseudotuberculosis Zymobacter Zeaxanthinibacter Xenorhabdus doucetiae Yeosuana Yersinia rohdei Zymobacter enoshimensis Xenorhabdus griffiniae aromativorans Yersinia ruckeri palmae Zhihengliuella Xenorhabdus hominickii Yersinia Yokenella Zymomonas Zhihengliuella Xenorhabdus Yersinia aldovae Yokenella Zymomonas halotolerans koppenhoeferi Yersinia bercovieri regensburgei mobilis Xylanibacterium Xenorhabdus Yersinia Yonghaparkia Zymophilus Xylanibacterium nematophila enterocolitica Yonghaparkia Zymophilus ulmi Xenorhabdus poinarii Yersinia alkaliphila paucivorans Xylanibacter entomophaga Zavarzinia Zymophilus Xylanibacter oryzae Yersinia Zavarzinia raffinosivorans frederiksenii compransoris Yersinia intermedia Yersinia kristensenii

TABLE 2 MEDICAMENTS ACE inhibitors with calcium decongestants respiratory agents otic agents channel blocking agents dermatological agents sex hormones renin inhibitors ACE inhibitors with thiazides diagnostic topical agents respiratory agents adamantane antivirals radiopharmaceuticals uncategorized respiratory inhalant adrenal cortical steroids diarylquinolines agents products adrenal corticosteroid dibenzazepine vaginal agents rifamycin derivatives inhibitors anticonvulsants mitotic inhibitors salicylates adrenergic bronchodilators digestive enzymes monoamine oxidase sclerosing agents agents for hypertensive dipeptidyl peptidase 4 inhibitors second generation emergencies inhibitors mouth and throat cephalosporins agents for pulmonary diuretics products selective estrogen hypertension dopaminergic mTOR inhibitors receptor modulators aldosterone receptor antiparkinsonism agents mucolytics selective antagonists drugs used in alcohol multikinase immunosuppressants alkylating agents dependence inhibitors selective allergenics echinocandins muscle relaxants phosphodiesterase-4 alpha-glucosidase inhibitors EGFR inhibitors mydriatics inhibitors alternative medicines estrogen receptor narcotic analgesic selective serotonin amebicides antagonists combinations reuptake inhibitors aminoglycosides estrogens narcotic analgesics serotonin- aminopenicillins expectorants nasal anti-infectives norepinephrine aminosalicylates factor Xa inhibitors nasal antihistamines reuptake inhibitors AMPA receptor antagonists fatty acid derivative and decongestants serotoninergic amylin analogs anticonvulsants nasal lubricants and neuroenteric analgesic combinations fibric acid derivatives irrigations modulators analgesics first generation nasal preparations sex hormone androgens and anabolic cephalosporins nasal steroids combinations steroids fourth generation natural penicillins sex hormones angiotensin converting cephalosporins neprilysin inhibitors SGLT-2 inhibitors enzyme inhibitors functional bowel neuraminidase skeletal muscle angiotensin II inhibitors with disorder agents inhibitors relaxant combinations calcium channel blockers gallstone solubilizing neuromuscular skeletal muscle angiotensin II inhibitors with agents blocking agents relaxants thiazides gamma-aminobutyric neuronal potassium smoking cessation angiotensin receptor blockers acid analogs channel openers agents angiotensin receptor blockers gamma-aminobutyric next generation somatostatin and and neprilysin inhibitors acid reuptake inhibitors cephalosporins somatostatin analogs anorectal preparations gastrointestinal agents nicotinic acid spermicides anorexiants general anesthetics derivatives statins antacids genitourinary tract NK1 receptor sterile irrigating anthelmintics agents antagonists solutions anti-angiogenic ophthalmic GI stimulants NNRTIs streptomyces agents glucocorticoids non-cardioselective derivatives anti-CTLA-4 monoclonal glucose elevating beta blockers succinimide antibodies agents non-iodinated anticonvulsants anti-infectives glycopeptide antibiotics contrast media sulfonamides Anti-PD-1 monoclonal glycoprotein platelet non-ionic iodinated sulfonylureas antibodies inhibitors contrast media synthetic ovulation antiadrenergic agents (central) glycylcyclines non-sulfonylureas stimulants with thiazides gonadotropin releasing nonsteroidal anti- tetracyclic antiadrenergic agents hormones inflammatory antidepressants (peripheral) with thiazides gonadotropin-releasing agents tetracyclines antiadrenergic agents, hormone antagonists NS5A inhibitors therapeutic centrally acting gonadotropins nucleoside reverse radiopharmaceuticals antiadrenergic agents, group I antiarrhythmics transcriptase therapeutic vaccines peripherally acting group II inhibitors (NRTIs) thiazide diuretics antiandrogens antiarrhythmics nutraceutical thiazolidinediones antianginal agents group III products thioxanthenes antiarrhythmic agents antiarrhythmics nutritional products third generation antiasthmatic combinations group IV ophthalmic cephalosporins antibiotics/antineoplastics antiarrhythmics anesthetics thrombin inhibitors anticholinergic antiemetics group V ophthalmic anti- thrombolytics anticholinergic antiparkinson antiarrhythmics infectives thyroid drugs agents growth hormone ophthalmic anti- TNF alfa inhibitors anticholinergic receptor blockers inflammatory tocolytic agents bronchodilators growth hormones agents topical acne agents anticholinergic chronotropic guanylate cyclase-C ophthalmic topical agents agents agonists antihistamines and topical anesthetics anticholinergics/ H. pylori eradication decongestants topical anti-infectives antispasmodics agents ophthalmic topical anti-rosacea anticoagulant reversal agents H2 antagonists diagnostic agents agents anticoagulants hedgehog pathway ophthalmic topical antibiotics anticonvulsants inhibitors glaucoma agents topical antifungals antidepressants hematopoietic stem cell ophthalmic topical antihistamines antidiabetic agents mobilizer lubricants and topical antineoplastics antidiabetic combinations heparin antagonists irrigations topical antipsoriatics antidiarrheals heparins ophthalmic topical antivirals antidiuretic hormones HER2 inhibitors preparations topical astringents antidotes herbal products ophthalmic steroids topical debriding antiemetic/antivertigo agents histone deacetylase ophthalmic steroids agents antifungals inhibitors with anti-infectives topical depigmenting antigonadotropic agents hormones ophthalmic surgical agents antigout agents hormones/ agents topical emollients antihistamines antineoplastics oral nutritional topical keratolytics antihyperlipidemic agents hydantoin supplements topical non-steroidal antihyperlipidemic anticonvulsants immunostimulants anti-inflammatories combinations hydrazide derivatives immuno- topical antihypertensive combinations immune globulins suppressants photochemo- antihyperuricemic agents immunologic agents otic anesthetics therapeutics antimalarial agents immunostimulants otic anti-infectives topical rubefacient antimalarial combinations immunosuppressive otic preparations topical steroids antimalarial quinolines agents otic steroids topical steroids with antimetabolites impotence agents otic steroids with anti-infectives antimigraine agents in vivo diagnostic anti-infectives triazine antineoplastic detoxifying biologicals oxazolidinedione anticonvulsants agents incretin mimetics anticonvulsants tricyclic antineoplastic interferons inhaled anti-infectives oxazolidinone antidepressants antineoplastics inhaled corticosteroids antibiotics trifunctional antiparkinson agents inotropic agents parathyroid monoclonal antibodies antiplatelet agents insulin hormone and ultrasound contrast antipseudomonal penicillins insulin-like growth analogs media antipsoriatics factor PARP inhibitors upper respiratory antipsychotics integrase strand transfer PCSK9 inhibitors combinations antirheumatics inhibitor penicillinase urea anticonvulsants antiseptic and germicides interferons resistant penicillins urea cycle disorder antithyroid agents interleukin inhibitors penicillins agents antitoxins and antivenins interleukins peripheral opioid urinary anti-infectives antituberculosis agents intravenous nutritional receptor antagonists urinary antispasmodics antituberculosis combinations products peripheral opioid urinary pH modifiers antitussives iodinated contrast receptor mixed uterotonic agents antiviral agents media agonists/antagonists vaccine combinations antiviral boosters ionic iodinated contrast peripheral vaginal anti-infectives antiviral combinations media vasodilators vaginal preparations antiviral interferons iron products peripherally acting vasodilators anxiolytics, sedatives, and ketolides antiobesity agents vasopressin hypnotics laxatives phenothiazine antagonists aromatase inhibitors leprostatics antiemetics vasopressors atypical antipsychotics leukotriene modifiers phenothiazine VEGF/VEGFR azole antifungals lincomycin derivatives antipsychotics inhibitors bacterial vaccines local injectable phenylpiperazine viral vaccines barbiturate anticonvulsants anesthetics antidepressants viscosupplementation barbiturates local injectable phosphate binders agents BCR-ABL tyrosine kinase anesthetics with plasma expanders vitamin and mineral inhibitors corticosteroids platelet aggregation combinations benzodiazepine loop diuretics inhibitors vitamins anticonvulsants lung surfactants platelet-stimulating 5-alpha-reductase benzodiazepines lymphatic staining agents inhibitors beta blockers with calcium agents polyenes 5 -aminosalicylates channel blockers lysosomal enzymes potassium sparing 5HT3 receptor beta blockers with thiazides macrolide derivatives diuretics with antagonists beta-adrenergic blocking macrolides thiazides chloride channel agents magnetic resonance potassium-sparing activators beta-lactamase inhibitors imaging contrast media diuretics cholesterol absorption bile acid sequestrants mast cell stabilizers probiotics inhibitors biologicals medical gas progesterone cholinergic agonists bisphosphonates meglitinides receptor modulators cholinergic muscle bone morphogenetic proteins metabolic agents progestins stimulants bone resorption inhibitors methylxanthines prolactin inhibitors cholinesterase bronchodilator combinations mineralocorticoids prostaglandin D2 inhibitors bronchodilators minerals and antagonists CNS stimulants calcimimetics electrolytes protease inhibitors coagulation modifiers calcineurin inhibitors agents protease-activated colony stimulating calcitonin analgesics receptor-1 factors calcium channel blocking antibiotics antagonists contraceptives agents anticonvulsants proteasome corticotropin carbamate anticonvulsants antidepressants inhibitors coumarins and carbapenems antidiabetic agents proton pump indandiones carbonic anhydrase inhibitors antiemetics inhibitors cox-2 inhibitors antifungals psoralens antihyperlipidemic psychotherapeutic agents agents antihypertensive psychotherapeutic combinations combinations antimalarials purine nucleosides antineoplastics pyrrolidine antiparkinson agents anticonvulsants antipsychotic agents quinolones antituberculosis agents radiocontrast agents antivirals radiologic adjuncts anxiolytics, sedatives radiologic agents and hypnotics radiologic bone resorption conjugating agents inhibitors radiopharma- cardiovascular agents ceuticals central nervous system recombinant human agents erythropoietins coagulation modifiers anticonvulsants diagnostic dyes carbonic anhydrase diuretics inhibitors genitourinary tract cardiac stressing agents agents GI agents cardioselective beta hormones blockers metabolic agents cardiovascular ophthalmic agents agents catecholamines CD20 monoclonal antibodies CD30 monoclonal antibodies CD33 monoclonal antibodies CD38 monoclonal antibodies CD52 monoclonal antibodies central nervous system agents cephalosporins cephalosporins/beta- lactamase inhibitors cerumenolytics CFTR combinations CFTR potentiators chelating agents chemokine receptor antagonist 

1-20. (canceled)
 21. A method of treating a liver disease or liver condition in a human or animal subject, the method comprising altering the relative proportion of a sub-population of host bacterial cells in a microbiota of the subject, wherein the host bacterial cells are Enterococcus cells.
 22. The method of claim 21, wherein the host bacterial cells are Enterococcus faecalis cells.
 23. The method of claim 21, wherein the microbiota is a liver microbiota.
 24. The method of claim 21, wherein the liver disease or liver condition is liver fibrosis.
 25. The method of claim 21, wherein the liver disease or liver condition is hepatitis.
 26. The method of claim 25, wherein the liver disease or liver condition is autoimmune hepatitis.
 27. The method of claim 21, wherein the liver disease or liver condition is primary biliary cirrhosis or primary sclerosing cholangitis.
 28. The method of claim 21, wherein the liver disease or liver condition is liver cancer.
 29. The method of claim 21, wherein the method comprises administering a bacterial transplant to the subject, wherein the bacterial transplant comprises cells of a bacterial species that is different from Enterococcus cells, thereby reducing relative proportion of the sub-population of host bacterial cells in the microbiota of the subject.
 30. The method of claim 21, wherein the method comprises selective targeting of the host bacterial cells of the microbiota using a guided nuclease, thereby reducing relative proportion of the sub-population of host bacterial cells in the microbiota of the subject.
 31. The method of claim 30, wherein the guide nuclease is a Cas, TALEN, meganuclease or zinc finger nuclease.
 32. The method of claim 30, wherein the guided nuclease is a Cas nuclease.
 33. The method of claim 32, wherein the Cas is a Cas3, Cas9 or Cpf1.
 34. The method of claim 32, wherein the method comprises: a. contacting the microbiota with an engineered nucleic acid sequence for producing a host modifying (HM) crRNA, and b. producing the HM-crRNA in a host bacterial cell, wherein the HM-crRNA is operable with a Cas nuclease in the host bacterial cell to form a HM-CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats)/Cas system, and wherein the HM-crRNA comprises a sequence that is capable of hybridizing to a target sequence of the host bacterial cell to guide the Cas nuclease to the target sequence in the host bacterial cell, whereby the target sequence is modified by the HM-CRISPR/Cas system and the host bacterial cell is killed or growth of host bacterial cells is reduced, thereby reducing the relative proportion of host bacterial cells in the microbiota.
 35. The method of claim 34, wherein the HM-crRNA is comprised by a single guide RNA (sgRNA).
 36. The method of claim 35, wherein the nucleic acid sequence encoding the sgRNA is under a constitutive promoter.
 37. The method of claim 34, wherein the nucleic acid sequence encoding the HM-crRNA is under a constitutive promoter.
 38. The method of claim 34, wherein the Cas is a wild-type endogenous host cell Cas nuclease.
 39. The method of claim 38, wherein the Cas is a wild-type host cell endogenous Type II Cas.
 40. The method of claim 30, wherein the microbiota comprises a mixed population of liver microbiota bacteria of different species, and wherein the method comprises selectively killing or inhibiting growth of Enterococcus cells and sparing cells of the other species.
 41. The method of claim 40, wherein the Enterococcus cells are Enterococcus faecalis cells. 